I stumbled on this site, while rambling through the labrynthine corridors of Pinterest, and I believe it will prove to be an invaluable resource.
While I do not as yet possess a bus to work on, I have started saving up, and prefer to use this period of time to finalize my design plans.
First and foremost, my intentions are to create a structure that will comfortably house up to two humans, and multiple critters of various species. I mean this literally, beginning with my pet rats, on up to my two Haflinger horses (they weigh about 800 lbs each).
Ideally, I would have a ramp door that opened off the driver's side of the bus, in the rear, for loading/unloading the horses, since I'd need to be able to haul either a trailer or a dinghy along. This, obviously, limits my interior space options a bit, but the plan is to position the permanently mounted dog crates under the half-wall that would separate the horses from the rest of the interior, position the bathroom behind/beside the entry steps, and put the bed over the "cab" area.
So, I'm wondering what kind of extra bracing, if any, would be required for the floor area, at the back, where the horses would be? Since my girls are small (only standing about 13 hands - 52" - at the shoulder, there should be no need to raise the ceiling of the bus), their area would only need to be about 12' in length, but I don't know if that would put them far enough forward to be over an axle or not, if that makes any sense...
Anyhow, that's my pipe dream, lol...I'm sure many of you who are far more experienced could tear it to shreds fairly rapidly, but please be kind and don't subject me to too much harsh reality all at once! ;)