Parts...RockAuto, will be less than half even with premium replacement parts.

It's all pretty easy with hand tools, easier with power tools. The front suspension, a little more complex, but certainly doable. Make sure you have an alignment shop appointment for the next day to get it aligned.

I've been totally through several (including a 1999 and a 2003) GMs and a Dodge. Torsion bars suck, which I assume yours has. Make sure you know what you are doing with them before you jump in.

YouTube is your friend.

Prices are a little high, but stuff ain't cheap these days. If there are things you need to get done, The Garage on Union is a good place to check with.