Why do I keep my landline? My young kids. If there's an emergency, they dial 911 and 911 can find my house. They don't have to try and find my cell phone and remember their address. Also, if a sitter is over, she or he can 1) find the phone and 2) not have to worry about remembering the address (which is posted by the phone, but your brain can turn to mush when things are rough). Other considerations: The phone will also work (most of the time), when the power is down. I also have DSL, so I need a line for that as well.

A few years ago I worked at a company that was heavy into machine learning. One of the problems in that space is getting a big enough training sets to train the various algorithms. You need enough examples to train the classifier and test it (i.e. several hundred). The company had a bunch of part time workers assigned to do that.

Now you had a small budget and clear guidelines, you could have other people do it for you.