I've been considering a trailer. Problem is it's annoying to store; I don't have a lot of space and hate it out in the open.
Mind you I don't have a pickup truck either, I have a Honda Fit-sized car. (See re: no space). Just considering it for when this car wears out.
My neighbor did the same thing, and built his entire deck, brought in all his concrete, boards, materials, etc in with his Mazda 3 on a small utility trailer.
These small trailers are so useful and cheap, I don't know why you'd spend any money renting one. And they're actually more useful than these pickups with short stubby beds that are only good for a half ton anyways.