There are more TT bunkhouses simply because they are more affordable. TT's are the best value in the RV world and can be towed by a less expensive truck.
Bunkhouses are for kids and families. There are lots of family needs and many families simply can't/won't afford the cost of a 5'er bunkhouse and truck capable of towing it.
My prior combo was a 36' 11k GVW TT towed with a Ford Excursion. It was a fantastic combo capable of taking and sleeping lots of kids.
The old combo was coupled with a Hensley Arrow hitch and towed just as well as my current fiver
The current rig is great too. However it cost significantly more, requires another vehicle to carry passenger if we exceed five people, requires more space and is not as nimble, does not fit into sites the old combo did.
In the end the 5'er combo is more expensive and less capable than my prior TT.
combo.
TT bunkhouses are more plentiful because they are a better value and thus more affordable for families.
Younger families just starting out get a lot more bang for their buck with a TT bunkhouse vs. a 5'er bunkhouse.
