Not to take anything away from any of the many good shops here in SA, but if you can turn a wrench, you can do most if not all of that work yourself, and it'll be more satisfying to do it yourself as well.
There's plenty of how to info here and other web forums to make it easy to follow step by step.
Begin by downloading the service manual for your bike. It's good reading... (really!
Then purchase the right tools for each job....a basic set of Craftsman or other quality metric wrenches/sockets etc and you're on your way! You'll build your tool box with specialty items with each new mod, and after a few years have a fairly complete collection (well, you can never have too many tools!)
Good luck and feel free to ask questions as you tackle each mod.
Lots of the guys have already done the mods you're looking into and would be happy to share their tips and tricks.
Maybe someone would like to conduct a "tech session" every so often so guys can get together and wrench...