Its really not that difficult to do a set of pistons and rings. I just finished doing mine for the first time (im a carpenter, not a mechanic), and it was pretty simple, as long as you have everything there. Rebuild kits are available on ebay for like $200, and theyll usually set you up with everything you need.
Do yourself a favour and buy the Clymers manual for the banshee, its like $20, its the "bible" for your bike, and bring it with you when you ride just in case. I bring mine just so I know if my day is gonna be cut short due to a $5 part or if whats happening is more involved. Itll give you all the info you need from changing the bulb to rebuilding a bottom end, mine came with one, but money well spent.