This assumes he can sell it for that much right away. If he holds the property until it goes back up to $2000, then profits is a misleading metric. IRR would be better, but that decreases as the length of the investment increases, like if he needs to wait to sell the place, so things don't look as good as you might think.
Of course while he's waiting he gets to collect rent, so that will help a bit. But he also has to pay to maintain the building, pay interest on the loan (which will carry a high rate because banks aren't giving loans easily right now, especially with only 10% down). Don't forget insurance. And, of course, if any of your tenants can't pay rent, or they move, then you'll lose at least 1 month rent from them and have to go through the process of getting a new tenant, which may prove difficult if you want to get as much as the last person paid, a monthly rate that was set pre-recession. Oh, and don't forget taxes, and not just the taxes on your rental income, but also property taxes which are based on property value and may have an assessed value a great deal higher than you purchased the property for. Point: there's a reason these buildings are so cheap.
Free streaming services are clearly not net positive for the industry
Blows my mind when they say things like that, it contains implicit assumptions about what "the industry" is. E.g., many indie labels are gaining significantly more exposure as a result of sites like last.fm. I'll agree that it's not net positive for Warner.
But this is a Good thing. Sure, producer surplus (profit) for the most major players has decrease somewhat, but consumer surplus (total benefit minus cost) has increased tremendously as we can now get tons of music for very cheap. But this is what happens when monopolies fall, they have to drop prices in order to compete and we are the beneficiaries. Who cares about Warner, people will always be making music, probably more now than ever since we're able to be exposed to so much more and culture begets culture. And now we have the tools to distribute that music without the big media companies.
Credentials: math major at Johns Hopkins.
There's a logical error in your first step. When doing algebra, one doesn't "move" the 0 from the left side by the right side, they multiply both sides by 0. The usual next step is to cancel out the left side and proceed, which you implicitly did but didn't explicitly show the step. However, when you multiply by 0, you have:
0/0 = 0*inf.
You CANNOT assume 0/0 = 1 and cancel it out because it's not uniquely defined; 0/0 = x for every x in the real numbers, imaginary (complex) numbers, and every other field.
To see if 0/0 = 0*inf holds, we need to know whether 0*inf exists in a field, but 0*inf = 0, we know this because part of what defines fields is how limits work with inf:
lim_x->inf x = inf
It's axiomatic. So when we apply this to 0*inf, we get lim_x->inf 0*x = 0. This gives us 0/0 = 0, which IS true.
Here's the catch: 0/0 does not equal 0 uniquely. The logic is such that if EVERY number can equal 0/0, then NO number in any field can define 1/0. Zero attacks every number but itself with decidedly beyond infinite feebleness.
Clearly "positions" means investment positions, so it's probably something like:
"Golly mister! You've been standing like that for hours! What gives?"
"Well son, my investment manager told me it would pay to hold my position!"
Hilarious! Nothing funnier than investment managers, they prove prostitutes aren't the only ones who use different positions to fuck people out of their money.
At the time I used straight LaTeX, but I made it work. The trick was to get a good editor and set up keyboard shortcuts for common things to blaze through the process quicker. Add on top of that a bunch of renaming functions in the preamble to save keystrokes for other common actions and keeping up isn't much of a problem.
That being said, I'm going to cast my vote for Lyx because you can still do all I suggested above, but it greatly aids in building tables, matrices, and other things that'll slow you down a bit. And don't be afraid to use shorthand that won't format properly when necessary, as long as you know what it says you can always fix it after class or during a lull in the lecture; I find this typically takes less than 5 min. And use lots of white space. And reconsider what the best way to keep notes is; when you have a medium with the flexibility of files, folders, etc, I find it's usually better to take notes by topic instead of chronology of when it is said.
Funny story, took notes all semester for my stat class that way and we got to use 1 page of notes for the final. About 20-30 minutes of copy/paste-ing gave me every equation we used, qualitative descriptions of what they do and when to use them, and a whole host of other useful stuff. Never studied beyond doing my homework (which I only did most of the time) but I got a 297 out of 300, highest grade in a class of ~150 and about half a standard deviation above the next highest score...
Or most of them, anyhow. Wow, that's clever though. We've been trying to decide the outcome of wars around the world pretty regularly since WWII, this just provides a very efficient means of doing so. It also gives a big disincentive for people buying US weapons on the black market (well, the really bad ones).
Of course there's always the fear of hackers figuring out a way to kill the kill switch, but at least it's one more obstacle. It'd probably be a good idea to ensure none of our craft, etc, have these kill switches though, just the ones we sell. I'm sure we try very very hard to protect the switches, but security systems of all kinds get broken, it's easier to find exploits than it is to create a system that has none whatsoever. If lives (potentially thousands or more) depend on it, why take the chance?
A noteable exception to this rule, btw, is when applied to a girl you're even slightly interested in; the right move is to, while channeling the complete confidence of Kirk, refuse to help her and, with a smile on your face, poke fun at her computer skills. If done right, she'll panic at the failure of her sexual prowess and will proceed to plead for your assistance to prove she still has control. She does not, you do. Refuse again, she'll persist, so explain, still while smiling and channeling Kirk, that you know girls love to get guys to do stuff for them for free and that you're not so easily controlled. She'll probably act offended or more desperate for help; either way ignore her emotions then offer her a compromise: if she cooks you dinner, you'll fix her computer while she's cooking. Bring a semi-inexpensive bottle of wine, then without asking pour her a glass to drink while she cooks. Fix her computer, come back and sit to her right (or left, not across), eat dinner while teasing her that her porn browsing adiction will only lead to more problems. If this doesn't sound right to you, consider the following: you have shown yourself to be ultra alpha-male, you have put yourself in a position of control, you have a date with a girl you're interested in where she is submissively making you free dinner, you kept her busy so she didn't see how nerdy you look when you hack, and you've left her feeling grateful for it all.
This file will self-destruct in five minutes.