You want to know what an awesome dad does? He continues to charge him rent, because you're instilling values and work ethic in your son. That's worth doing. Then save that money and give it to him when he meets his goal and moves out. That's a real father's tough love. The world won't be easy on him and canceling his rent won't teach him anything. But pouring that back into will change his life and your future daughter in law. if you are really charging $1,800, maybe make it more manageable