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I plan on hauling it down the road with a two place snowmobile trailer. I don't know, maybe I'm crazy for doing this, but I'm saving a huge amount of money.
How about 2-1" or 2" x 14' to 16' nylon slings slung under the tub about 18" in from each end and a 2x4 or 2" sch 40 pipe about 7-8 feet long through the eyes of the slings and 4 guys? Make the slings just long enough to go under the spa and about 2-3 foot up each side. so you are just straightening your legs to lift it 4-6 inches. Pick guys all the same height preferably your big friends.....LOL Put the strongest guys on the equipment side. Easy smeasy. 2 beers each. Might as well feed em some snacks then kick em out.
Not trying to be ugly here, but I wish you had left that last statement off. Taking the product back after you use it... If you can't afford $6.00 worth of PVC ..... Hopefully, you will scar it up real bad during the using of it.