Yes, the Thule Hullavators are frightfully expensive. I know a guy that has TWO of them for his sit-on-top fishing kayaks. He says he got too old to be hoisting them up at 70 pounds a piece.
Sorry, I didn't say - I was a kayak guide in a past life. In my "boat" room are 5 kayaks - 1 recreational kayak (14' long, 28" wide that was my first boat), 2 transitional sea kayaks (not quite long and skinny, but more form fitting), a boat I built for me (wood frame, cloth skin - super tippy with lard a...(cough).. in it) and a boat I built for my daughter.
The Hullavator wasn't what I was thinking, this is more what I was thinking:
Yakima BoatLoader roof Watersports Rack
Or something like this:
Yakima Hully Rollers
(I thought Thule had a similar product, but I'm having a hard time finding it at the moment) - with these, you put the front of the boat onto the roller and then roll/lift the back. You're only lifting 1/2 of a boat at a time that way.
As well, here's a recent thread on a local paddling association's board:
Chesapeake Paddling Assocation forum