I have a MH now, but I used a TC for years.
A lot of people use a short bed truck for hauling a camper because that's what they had and didn't want to put out the money to buy another truck. It sounds like you don't have either at the moment so I would strongly recommend you get a standard 8' bed truck with the longer camper to go in it.
I know you're used to the space on a boat, but I'd never go with the cramped space of a short bed TC. The one place it does make sense to me is using the short bed camper in a 8' bed. This gives you room for an extra fuel tank and generator in the front of the bed. Plus space for things like lawn chairs, the BBQ and so on.
Bill