I mean, I'm in Hacker School this batch (which is sadly ending this week) and I live in a hostel in Bed-Stuy for $650/mo. You don't have to be rich. Certainly way cheaper than college tuition for me.
Attending hackerschool is not solely a matter of circumstance but intention. If you want something enough you'll do what you need to do in order to get it.
The service Hacker School provides is free.
That doesn't look like an arbitrary social barrier designed to exclude the many to me. MOOCs are still there, and still awesome.
Also someone did run a kickstarter to get funding for their expenses in NY, and it met the funding goal almost overnight.
Hacker School is a one of a kind experience. If you attend you will be among a group of people that will have 100% participation, no one there is unsure about what they want. You also will work with some of the smartest people in the industry through the Resident program.