So I've came up with (What I think) is a perfect plan for a homemade sandblast cabinet, Benny & I did a little horse trading and I'm gonna end up with a Mazda B2000 truck cab with all of the glass in it and both doors. All I'll have to do is make the bottom chute & a frame/base to hold it and roll it around.
Should be plenty big enough for about anything I would need it for, plus it could be used from front or rear as suggested earlier. If I need to do something really long I can roll down the windows.