If you can afford that kind of thing, it sounds great!
However, manicure and pedicure are about $15 each, waxing (depending on WHAT you're getting waxed) runs from $10 for eyebrows to $40+ for bikini/legs/etc, I don't know what just a haircut goes for because I only get mine trimmed when I also get it colored, which is once every three months, and that only because my mom pays for it as her gifty to me, but the coloring costs $75+ cause I have very long hair.
So according to that schedule, you're looking at $45+ a month for just beautifying stuff. Which I know that I, for one, canNOT afford. But, if it's within your budget, it's definitely a better reward! My rewards to myself usually run along the lines of letting myself veg out with Photoshop all day doing grafix work, or something like that. Only the things I don't have to pay for.