Anyone got any pointers in regard to a decent, affordable slide on camper?

My problem, not a new one I know, is that I want to take my boat with me when I camp. It is a 5.2 Quintrex and so needs to be towed and launched. This of course presents a problem for my current set-up of GQ Wagon and roof top tent. Launching requires a quick, pack the camp and yes it is pretty quick but inconvenient if it's at night.

My answer, buy a Ute, get a slide on camper, when we arrive at the camp site, set-up by jacking the camper onto the ground and drive out from under and viola, a vehicle, free from the camp that I can now use.

The dilemma, choose a vehicle, what am I saying, it's going to be a Patrol, but a 4.2 or a 3.0??

Then of course what camper? Buy, build? New used? Any input is good input so fire away..

Patto