in my opinion its way better to do it your self! Spend the 10 bills for a bottom bracket tool and the 5 bucks it costs at home depot to make a cup press out of some threaded rod ,big ass washers, and a couple of nuts. Some allen wrenches couple of other wrenches.... If you spend 50 bucks on tools youll be able to take you bike apart and fix it when something goes wrong VS paying fifty bucks for some goon at the bike shop to put it together for you for 50 bucks and a half hour of their time. Then down the road start buying a couple other tools crank pullers and other stuff youd like to have so you dont have to use a hammer to get your cranks off! As far as the fork..Get everything together so its comfy to ride. Then make a mark on your fork where the top of your stem is and cut it an 1/8 below that mark (pipe cutter)... Bike are easy just got to finger them a little bit.. But you will be way better off in the end if you do it your self! My 2 Cents...