New Guy here. Hello! I would like to get some guesstimates on the weight of a custom teardrop that is roughly 80 inches wide by 84 inches long. It would be a stick framed insulated shell with aluminum sides. No cabinetry beyond a couple of simple shells. No kitchen as the only door will be at the tailgate. Definitely a fantastic fan and some windows.
My idea is to build it to be about two feet high at the cab of my truck and curve up to be the full 4 feet high at the tail-gait. The bigger dimensions are so that I can fit my wife daughter and I plus two dogs on the king size bed I will put in it.

I am wondering what the guesstimate is on weight to see if the sides of my truck are strong enough to hold it. I am trying to avoid building supports into the truck bed to help carry the weight.
I dont want to build a traditional teardrop because sadly I am an over consumer and have a trailer I will be pulling with a couple of ATV's on it.
Weights of similar sized teardrops without the metal trailer frame would be very much appreciated. Thanks!