I haven't filed taxes since 2012 (married, filling jointly at that time). I've been unable to work since 2007, medical issues, but can't qualify for SSD/SSI and I haven't had medical insurance since around 2008. I'm married, but my husband deserted me April 2013 and hasn't contributed financially since mid 2013. I don't know what status he uses when he files his taxes. (married filling separately or?) I have no way of contacting him to ask. My father, Retired Army 1st SGT, has been paying my rent since 2013. I've been going to food banks and using SNAP benefits, when I can qualify for them, since 2013. Would I qualify for a stimulus payment? If not, could my father qualify for a larger stimulus payment since he supports me by paying my rent? I'm lucky enough to have electric included in my rent.
Unfortunately it sounds like you won't be getting anything, even if you file a return with no income.
You said in a comment that your father pays more than 50% of your living expenses. This means he can claim you as a dependent, which means you are ineligible for the stimulus check. Note that even if he does not claim you, you still can't get the check. The questions is could he claim you as a dependent, regardless of whether he does or not.
Your father would also not get the extra $500 for you since I assume you are over 16 years old.