I have been looking to do this for a long time (over a decade). Last summer I bought a 1994 Thomas International at government surplus auction for approx. $1300. So far I have removed all the seats, removed the rubber floor, install a wide pine ship lap floor and poly urethaned it, built a the master bed bunk with storage underneath it, and put some cripple studs and insulation along the walls. My biggest concerns are black/grey water tanks and mounting propane tanks. Any suggestion or pictures of what you have done would be appreciated. I've attached some pics to the post.