3" lowering blocks: $67
Two sets bumpstops: $20
Two shocks: $50
"Hard" is a subjective term - it was super easy for me. It may be more difficult for you. On a scale of 1 to 10 it's probably a 3 or less. You can do it in an afternoon.
Detailed way to do this? Did you clicky the linky?
Lowering the Hideous Hardbody - Mr. Wellwood
^^^ clicky ^^^