How difficult would it be to have a module where users can sign up and create a profile and be able to record where they golfed, and when, how many holes, add in the pars for that course, their score, handicap, total and be able to continue keeping their scores. kind of like a myspace page/blog or whatever, but for personal golf scores and be able to compare it with other golfers or view other golfers scores, searching by name, course, city, etc.??

It's something i'd really like to setup on my website but not sure how hard it would be to make something like that?