ah, ok.
there are many variables but for starters I would say something like these..
comp - if noise isn't a problem
http://www.ebay.co.uk/itm/EINHELL-24...item53e91734a3
brush
http://www.ebay.co.uk/itm/AIRBRUSH-K...item43a74d7f4e
or as said, a revolution cr is a decent low end iwata
then you will have enough for some paints etc