Based on your budget and the truck you currently own, you are going to be hard pressed to find a camper large enough to do what you want it to do within the capabilities of your truck. To do everything you are looking for no less than an 855 Lance, or an 811 Arctic Fox Camper is in order. These are both short Bed campers with a single slide. To safely handle these campers and tow a boat they will need to sitting on a 1 ton dually, and there is only one manufacturer that builds a shortbed dually, Ram Megacab. You will need to really open up your wallet if you are serious about upgrading! Truck camping with all the amenities and roominess isn’t cheap.