So we have an update. As long as things go as planned, MIL should only be here 2-3 weeks, not months, but that's assuming everything goes as it should. BIL handed his credit card over to his BIL to start work on his attic this weekend. Apparently, it won't take long to do at all. Then they will be moving their bedroom up there, giving MIL their old room on the second floor. I'm still not thrilled that she will be here but I'm feeling a lot better about it right now. DH has been in touch with the realtor down there who is getting right on things. She's the same lady that sold the house to his mom and She estimates the house should be sold within 2 months. Hopefully....