Bench Overview: Quick look at How To Replace the CV Boots On Your Car. Cheap And Easy! in the shop.
If you want to replace your CV boot only these kits run around $15.00 and can be installed with a minimum of basic hand tools.
Its a messy job, but totally doable.
In contrast if you want to pay me to do it at a shop, expect to pay from $250 to $450 for an axle with install.
After a little quick math is becomes clear that a messy day in your driveway sure beats shelling out that much $$!