Consider a hybrid camper, you will have more bedspace, and it will be lighter. It won't be as roomy, but it would be easier to find a tow vehicle for.
Like everyone has said, a suburban, or a expedition won't handle it. The problem is the payload capacity of the tow vehicle, which is the amount of weight that can be added to the tow vehicle. This includes weight of passengers, and anything packed into the car, as well as the tongue weight of the camper, which when loaded will probably be 1000lbs. I can see needing 2000lbs of payload easily.
Overloaded like that, those campers will be wiggling that suv all over the road, and will be miserable to pull.
Also, the bunks in campers are pretty small, we bought our bunkhouse when our son was 12, and like 5'6, now he is 6'2" and does not fit on the bunks, so we end up having to use the couch for him, so think about growth.
Sorry to be a downer on the SUV, but I've got 2 friends in the last year that listened to the dealer and bought campers like what you are looking at, and had 1/2ton trucks. Both were miserable towing, and ended up buying 3/4 ton trucks.