Your best bet is to find an experienced professional and get the work done on the right schedule to get to looking finished as quickly as possible and then step down to the schedule that will keep the hair treated while still not visible to the naked eye. Unless you have an ongoing condition that is making your body recruit new hairs, you would be done in a few hours spread out over 9 to 18 months.
Home work is best done by two people who read professional electrology text books, purchase professional quality equipment and work on each other. Doing it to yourself is cumbersom, and assures poor quality work. In any case, the speed that a good pro works is much faster and safer work than anything you and or your friend could do at home.
I recently had a client who did some work the DIY way that looks like someone used a hot poker to make constellation maps on the skin.
Since the results are permanent, your best value is a really good pro. Unfortunately, finding a good pro is not as easy as falling off a log.