Hello!
I sure am happy for You, to have lots of money, it's good to hear the financial crisis didn't ruin everybody.
As for figure painting - always there has to be a first time. I don't think using brushes would hurt You, sometimes - from time to time it's more convenient to paint something with a brush. But if You say definitely NEIN to brushes, no big deal. You sure can paint everything with an airbrush. Just use the so called "mask". You just mask the spots and You are good to go. Takes You like ten times more time and effort, but it's Your call. Good luck with the build and have a nice day
Pawel