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
Nodwell RN110 out moose hunting. 4-53 Detroit, Clark 5 spd, 40" wide tracks, 10:00x20 tires, 16,000# capacity, 22,000# weight. You know the mud is getting deep when it's coming in the doors.