....unfortunately, it looks like due diligence wasn't done all the way to the end on the buyer-side (the buyer is providing the truck: about 2/3rds of the components making up a truck and camper rig).
It'll be a really tough one to argue with the dealer; however, if the dealer was smart and customer-care oriented, they could, if they play their cards right, keep a customer, by taking back the camper, and calling it even. Then, offering you the same camper, at cost (becaue the camper is, in effect, now "used"), after you up-grade your truck to something closer to a half-ton (like a Tundra)...
IF: you've bought your Taco "used", you could sell, and buy a used Tundra, perhaps even hedging a possible loss, with a little luck ?
On edit: see your Taco is a 2014. Can you swing a fast switch with a demo Tundra at same dealership ?
