GTFO!!!

So we have a roommate who is practically family. A friend who was Best Man at our wedding and we've known for 15 years. Almost 10 of that we've lived with him. When we bought our house about 6 years ago, it was perfect for having an apartment downstairs. He's rented from us for the last 4 years (in this house) and it has helped out with the mortgage. Except for the year-ish he didn't pay rent at all. The problem now, is he was given notice in January that he'd have to move in May, because we have a baby on the way. He knows that we have to do some remodeling, carpet replacement etc... The reason he is not out yet...wait for it...is he didn't have time to do anything because of school. His solution, rather then go through his shit, purge/pack and be a grown up, was to too churn for a week while were gone, look at one apartment, and sign up for more classes. So with 5 months notice, he couldn't manage to pack and find an apartment. This is a man I've been honest with. He knows about my history with hoarding. He knows that I find his level of clutter and attachment to stuff to be triggering, and I've flat out told him he's a hoarder and needs therapy. He is not an abusive hoarder or one that does guilt trips. He's friendly, fun, nods and listens to all you have to say, and responds with all the right things. Then goes and does whatever he damn well pleases. He wasn't a hoarder before he moved into this house, but he certainly is one now, even if it is in just the early stages. While I've told him my feelings, I don't think he grasps just how bitchtastic I'm going to be over this. Under these circumstances, I would throw my own mother out on the street, where she still alive. Why? Because it's not my fault he doesn't have anywhere to go. It's not even a financial issue...he can afford an apartment, he just hasn't looked. On top of all the hoarding issues, he's got to deal with the added bonus of upsetting the hormonal pregnant lady and interfering with her nesting. My husband is trying to get him out in the next week, so I won't enact 'nuclear protocols' that insure we never speak again.