From what I've seen, Capri only makes a pick-up slide-in model.
is that what you're considering??
A 7 x 14 cargo trailer will offer nearly twice the living space, and you can still haul your cargo in it, not to mention leaving the truck's bed available for hauling stuff too.
There are so many different reasons to go in either direction, it's hard to advise you unless you can give us some ideas as to what environment you plan to live in.
What I mean is, will you be traveling alot, or will you be staying in one basic area long term?? Do you plan on sticking to the highways or heading out into backcountry? Are you OK with losing the hauling capacity of your truck bed with a camper in there?? Are you AND your doggy friend OK with climbing up a tall set of stairs to get into your truckbed 'home'?? (older dogs may have real issues with this)
what are your thoughts??