Buggs, you state that you are on disability. That is important to your quest for a machine. Without knowing your disability, most recommendations will be worthless. Most of the machines are going to require the ability to lift a heavy object to set up the machine. At least for ATEC and Jugs. A used pitching machine might be your best bet and they can be found at places like Play it again sports. Buggs, something else to think about without knowing your disability, is whether you are physically able to hit, pack, and hookup some of these machines.
A suggestion might be to find a used ATEC Rookie machine but you would still have to find a small generator to run the machine unless you have access to electricity.