So how would one go about taking away home ISPs' ability to get away with charging both sides of the connection?
Title 2 reclassification, which the President has proposed, is *exactly* how you do this. Common carriage, a form of title 2 regulation which governs the phone system, among other things mandates that phone infrastructure owners resell service at a reasonable wholesale rate to other phone providers. This is why you can buy phone service from any phone provider - not just the one who owns the cable that comes to your house.
The problem you're articulating - a hugely important problem - is exactly what the President is trying to tackle here. Net neutrality is part of it, but title two reclassification gives the FCC much, much broader powers to keep the eyeball networks (i.e. home broadband providers) in line. It doesn't predetermine what the FCC will do with these powers, but this is the right track.
For more details, I recommend Susan Crawford's excellent book, Captive Audience. http://yalepress.yale.edu/book...