I have some clippers and thought about doing it myself.
SuperCuts charges $14.95 for a haircut with out a wash.
Call ahead and you will not wait. I give the girl a $20 and let them keep the change. In and out in less than 20 minutes.
Clippers alone is difficult. You just use the clippers to trim around your ears. You can get a kit at Walmart for $30.
You use the 1" attachment for the top. 3/4" around the top. 1/2-1/4" on the side. 1/8" for sideburns... You get the idea. It's as simple as that. Takes me about 15 minutes.
I like to save the money, but mostly it's the time. Who wants to drive there, sit and wait, and listen to Lady Ga Ga?