I Told My Grandfather I would Check Into this.

I Told My Grandfather I would check into this business for him.
http://www.thebackrubber.com
Pay massage chairs. He was interested in buying some of these massage chairs. I've been looking at all the different aspects and I though I would post this here to see if I may be missing any negatives about it.

They seem like a good investment unlike vending machines that need to be stocked. With these there is no product to buy after the chair. Just find good locations. My grandfather is 91 and been self employed for 75 years. He has no bills; he's just looking for something to bring in a little money every month. He's actually a millionaire but just need's something to do to keep busy. Please give me your thoughts.

Thank You,
Jason Hatchett