We bought a park model when we were seasonal. We had a 12 wide that was 34 feet long. We had double loft for the kids to sleep, plenty of room, my daughter would have sleepovers with six people and the 2 boys had their own area. We had a full queen walk around roomy bedroom. There was a kitchen/dining area with a full fridge, stove and microwave and a living room with a sleep sofa and slider to the outside. It was made by Canterbury. The hitch was removed and put under it, 2 axles stayed on but the third was removed for the black tank, no grey tank, it was set on blocks. This was a great place for the ten years we had it, we got a lot of use out of it.
Other park models that are more camper like are about 104 inches wide and either 40 or 44 feet long. The slides on these generally are pushed out and set on bricks, many leak.
If you are not seasonal or or have property then you would most likely be interested. For the 12 wides you need a semi or large truck and a wide load sign.