How long would you let an old friend live with you?

An old friend of my husbands moved in with us last week. To his credit, he is a hard worker and is looking for a job but he's not the sort that people are going to be eager to hire.

He doesn't shower as often as he should, his clothes are raggedy, he's quit school in 9th grade and rambles when he talks so it's hard to follow.

Some have said we should just kick him out but he truly has nowhere else to go. He will be homeless if he leaves here and then he'll have a harder time finding work and will most likely never get off the streets.

I want to try to help him but I absolutely hate him living here. Home is my sanctuary from the world and it's been invaded!! He's a nice guy and honestly I wouldn't want anyone to be homeless if I could help them. But I just don't know how long I can go on with this. When I think of 4-6 months from now and he's still here I want to run screaming into the night. 4-6 weeks is horrible enough.