I Am Fed Up With My 'roommate'

There are long periods of time where he will keep to himself because he is an introvert, but he is also bi-polar and has these horrible episodic outbursts when he believes something is unfair or not to his liking. He has also convinced the government that he is mentally and or emotionally unstable to hold a job, so they have been sending him money. But he is unhappy with his life because he doesn't receive enough money to have his own place without having to worry about other people, and would rather live with people like us who he knows rather than with strangers...but we can't get him to live with anyone else, nor will anyone else accept living with him. We opened our doors to him almost 4 years ago for a second time thinking that he has grown up and that it will be okay, but have realized that it was a big mistake despite getting rent from him once a month that he doesn't fail to pay. That is really the only upside besides the fact that he washes his own dishes and buys his own food. You can't ask him to help clean anything because he finds an excuse not to, as he believes that he doesn't make messes. Just because he cleans his own dishes and puts his stuff away doesn't mean that the bathroom, which guests have to look at when they visit, cleans itself. And, he will turn the A.C on in the middle of winter while we're asleep because his computer is fanning heat and steaming his room, and sometimes in daylight even if cold out, he will turn on the A.C because the sun is shining in through his window where he placed the table for his computer to sit on. And he expects everyone to bend to his expectations even though we work and he doesn't do a darn thing but sit on the computer in his room and play video games. He has lost sight of what it's like to have a boss to report to, and every little problem for him has become the biggest problem in the world. No matter how many times he's yelled and screamed and thrown a tantrum, my boyfriend, the person in charge of the mortgage has allowed him to stay. I have tried to tell my boyfriend that it's not going to get easier, and the longer we let him step on our toes, the worse it's going to get as he sees just how far he can get with his demands. I've tried to tell him that we're never going to get rid of him at the rate we're going, because if we haven't by now with all the problems we've had then he will be with us forever. If I had the money, I'd shovel out money for a tiny house he can rent to own with no credit check, and send him to the tiny house park in our city.