Here are MM's screen shot tips:
Maybe a couple hundred bucks including a $60 sprayer... I say go for it, this was my first shot at it, and although it's far from perfect, the results are stunning.
More screen shots with a little better lighting. These are with 1 CFL and 4 incandescent 65W flood bulbs full on in the room (but in strategic locations). The pics look like the room is pitch black, but it was really far from it.