It costs me about $100 a visit
So I bought a Total Gym 1000 like what Chuck Norris uses (so it must be good) The good thing about it is I can do the lying down like you would on a surfboard, then inclinded by about 33 degrees and "paddle" like you would on a board. My surfing is OK but the paddle out on medium to large days kills me. So I'm building up my paddle muscles in the comfort of home.
I may stop going to the gym.