Check Out Granite Vanity Tops
Granite tops used to be for big-buck bathrooms only. But now you can get one for less than $200 at home centers, including an attached, under-mounted sink. If you need a vanity for a corner, buy one with a backsplash along the back and one side to protect the walls from water spills.
Mount the faucet in the vanity top before setting the top in place. Then you won’t have to lie on your back inside the vanity and reach up under the faucet.