I know where there's a copy camera mounted in a building/darkroom if you are serious about going bigger. I think the vacuum back on that is something like 30x30" You'd have to mount in a trailer for it to be portable. I really want it for doing life size group portraits as contact prints. No film holders, the back is the film holder. I have no idea what it weighs. It's got several feet of bellows. I doubt it'd make sense to come from presumed Toronto Canada to central TX to get it.