For Real Sporterizing it will be expensive, but the simple stuff aint cheap either.
For example, if you were to convert yours to a Sniper, it would be cheaper to just buy the Sniper.
If you want to make something exotic out of it, you will need specialized tools, and the really nice parts that you use to modify it will also be very expensive. Now to just clean a firearm, that dosent cost much, a simple cleaning kit, you can pick up from Wallmart for about $10 will work.
Good luck with your project.