$150 if you don't mind looking at the exposed 1/4" copper line run over the top of your back door.
About $5000 if you want it hidden: new floor, new cabinets, new countertop, new sink, new faucet, paint, etc.
Basement, I forgot about basement plumbing (no basements in Tucson). Still about 2-3 hours work (1 hour actual work, 2 hours scratching butt and talking to customer), what does your plumber charge per hour? A handyman could do this for cheaper.