Prayer Bump
If your ex is willing to help you out this much, why not ask him to help you buy a duplex where you live in one side with your pets and have a renter in the other side.
Rent property is income that you dont have to be mobile for and you dont have to show up. If there is a maintenance problem, you can call someone to fix it.
I know several people who are old and disabled and they do quite well renting properties. Getting your first one is the hardest, but if you can have success with one and build equity, you can buy more and increase your income and decrease your dependency on others.
Soon you will be able to afford your own car, food, etc.