Umm here is the rub. You won't be able to kick him out of a house he owns. He has legal grounds to live there. It isn't as simple as that. And the fact that he makes 200K a year is a HUGE redflag here.
IDK what state you live in but in many common law marriage rules automatically become in effect after so much time passes living together. That may actually help you in this case.
I am GLAD you are taking your time and doing your homework. Its needed in this case.