Our Keystone Bullet Premier 31BHPR meets most, if not all, of your listed needs. It has a rear bunk room with 2 upper bunks and a lower futon that opens to a king size bed. Seperate entrance into the bathroom. Good size fridge and large open seating area. The outside kitchen is great too except the 2nd fridge is electric only.It has an enclosed underbelly with ducted furnace and AC. We camp well into October without problems. Outdoor shower is between the slides so you can hang a curtain rod between them if you need privacy.
The only miss I see is the front bedroom. It has a wall with the entertainment unit between the living area and front bedroom, but curtains, no door to enter. It could be modified for doors.
Can be had for under $30k
Very happy with ours, no problems either. The same layout is available under a number of different brand names.
Pics and layout