Cost me 4K to outfit mine disregarding the topper
I’ll admit I added a solar system, but even at $3000, this isn’t fancy.
Framing, insulation, electrical, flooring, wall carpet, wall board, trim, paint, Futon, fridge, insulation, a/c/heat, TV, cabinet hardware, etc
Kids are always like “oh a couple hundred bucks”
Price out your whole build top to bottom before you start or I guarantee you will burn through your original budget