I, too, hope I did not come across the wrong way, Airbrush Artist.
One of the things I really like about this site is that, while there are some pretty blunt members here, most of them are pretty sincere about their well meaning...and a large number of members likewise demonstrate their ability to swallow their pride in the face of facts, experience, and sound advice. This is because "The High Road" is an important philosophy on this site.
I haven't been here long myself, but this is an important quality to me. I wouldn't waste my valuable time on a site which only offered me endless sniping and bickering.
You've never come across as anything but an intelligent, responsible person in the postings I've seen you post. That's important to me...and it makes me not only want to treat you with respect, but to give you what I feel is honest and sound advice/opinions as a result. I don't go for the low-brow approach, at any rate.
What you do with your Brother-in-Law in the future is, indeed, up to you based on your first-hand knowledge and experience with him. I won't second guess you on that. But I will continue to offer up my own views and opinions based on the information you post because you obviously think it's important enough to post them in the first place.
I would expect no less from you in return, should our roles be reversed.