A few rv rentals will deliver the trailer to the cg and set it up, then come get it afterward. That way you can roll in on Friday night and just get inside the trailer. For a weekend rental, this is about as easy as it gets.
Frankly, if money is tight, I would suggest scratching the camping itch with a tent for a few outings until you can afford to buy an rv. Trailer rentals are too pricey for me. For the cost of one rental you probably can buy a tent, cots, sleeping bags, single burner butane stove, and a lantern that all will be yours to keep at the end of the trip. No climate control or indoor plumbing, but it gets you out there for a weekend adventure.