The Ford chassis (amd the WorkhorseW22/24 too) has a 26,000 lb GCWR, which means that the motorhome must weigh no more than 19,000 lbs [fully loaded] if you plan to pull a 7000 lb trailer. That puts you down in the 30 foot size range on a Hurricane. Don't know if that is the size you were considering or not.
I would be very much surprised if the Hurricane has a hitch strong enough for 7000 lbs, though. It's probably a Class III, rated at 5000 lbs. Besure to check on that.
The Hurricane is a vacation class rig, i.e. is intended for occasional use. Cabinetry and materials will be of a lessor grade than higher priced rigs. That's probably OK given the usage you described, but if you are anticipating full-timing or extended travels, I would suggest for a mid-line rig even though it costs a bit more.
Personally, I would want a diesel pusher to handle a trailer that big. I drive a gas rig myself and am not biased toward diesel, but with the kind of load you are talking about, a diesel will perform much better. Don't be afraid to look at used ones - there are many excellent ones available.
