May not be expensive for you but when your out of work because of how sick you are and have 2 kids to provide for and buy Christmas and birthday gifts for then 40 bucks is a lot of money. When I was still working in the hospital then your correct that's not a lot. My own family doesn't even help me out with money. I wish someone would let me try one to see if it works and if it did when I got well again I'd pay them back 7 fold.