So...
-He argues for the sake of arguing
-He whines
-He doesn't respect your wishes
-He doesn't acknowledge what you've done for him

You aren't dealing with a very mature person here. This tattoo business seems to be bringing out his bad qualities. It doesn't sound like your needs are being met.

Facial tattoos are a big decision, and shouldn't be done after contemplating for a couple of months. Maybe he should pour his energy into getting a job instead. Twenty-five is really young to make such a commitment, imo.