Life decisions are hard enough when you are in a healthy relationship. Add in an A partner and making good decisions can be horrid. I think you need to try to have a conversation with him stating your opinions on it all. If you stay there how will the bills get paid? How does he see this working? Perhaps ask him to show you how it will work? Not sure if it will help but before you made a decision I personally think you need to try another discussion with him. It maybe a fork in the road of life for you. You may need to determine what is best for you, even if he does not find it appealing. I do not think you are being unreasonable. You seem to be logically thinking it out.
Good luck!