nail art

I have studied beauty therapy for two years at bournemouth college and am now studying accountancy! I am trying to create an onside business by doing nails, specialising in artificial nails and nail art. I currently use nail art pens and nail polishes so is all done by hand, i was wondering wheather any one has tried air brush or wheather they ghave had it done and think that it has a nicer finish or wheather you prefer nail pen designs?? I currently am buying my equipment from ebay as i am finding it most value for many has any one brought nail art supplies from any where else or have any suggestions on where i can get it from?