I'm curious as to why you don't think the Detroit Diesels in them will work for full-timing.
I've not read every thread on this site, but what I have read tells me that they have excellent engines, and the parts are cheap and easy to find. When properly maintained, they can easily run 500k to 1m miles.
I'll fall out of my chair if these two busses sell for less than 10K, but if I had that kind of money, I'd be all over them.
Here's a link to threads posted by mokibrabrant: http://www.skoolie.net/forums/search...earchid=142619
He really knows a lot about Crowns, and if you scan his posts, you'll soon find plenty of info.