no one will guarantee a perfect job on fender rolling - there are too many variables beyond the rollers control try my buddy max at hypertek area 51. but if you want zero chance of cracked paint, get different wheels/tires - there is no way to 100% prevent cracking (sucks. but if you do get cracks they are very small and in a non-visible spot since they'll be on the lip or inside of the fender. touch-up paint will make them non-existant)
^ so you don need to roll your fenders. if you wanna be picky about it, do it yourself. there was a fender roller floating around the club awhile ago. use a heat gun, and make sure everything is nice and hot, and go really slow. thats about as much you can do. good luck
ohh yah...i dont need to roll my fenders just seeing how much it might cost for someone who has done it a few times...