The only other benefit besides SSI I receive right now is SNAP, which they base the amount you get off of how much rent you pay/other expenses. Basically how much money you have left to spend on food. They will most likely ask you for your entire medical history, the names and #s of your doctors, the names and dates of any hospitals you've been admitted to. They will also want to know your work history, and how your issues affect you on a daily basis. It's important that you be sure every detail is accurate, because if they find any inconsistencies they could disqualify you from receiving benefits. I can only speak for SSI because that's all I get. The maximum amount in my state for an adult living on their own is $736. If you are receiving any support from family, it could reduce how much you get.

If you don't get approved the first round, I would say get a lawyer and file an appeal. My case was a little bit different. I was approved the first time and didn't have to go through much because I had already been hospitalized about 15 times, so a lot of information was already in my file. I have not participated in Ticket to work, although I considered it. If you end up on SSDI though, there will be better options, such as trial work periods.

FYI about low income housing. At least where I am, the waiting list for a subsidized (where you pay 30% of your income) is very, very long.