Have you considered getting a pizza franchise (in a good neighborhood)? Pizzas are incredibly cheap to make... I think it was something like $0.35 food cost per pizza. From what I heard while there, much cheaper food cost per product than other fast food restaurants.
Just a though from someone who spent over a year in that business.
Alternatively, deliver pizzas in a good neighborhood. I made enough on that working somewhere between part and full time to pay for an apartment and bills. There were a few nights I walked away making more than the manager did that day. XD I wouldn't be a $1000/mo income figure, though.