I haven't made a bow that took less than 1 case of PBR ....
Ron, I'm with you 100%, the equipment to make all the lams etc. can be very expensive. It's definately not worth buying a drum sander to make a bow or two ... you need to be a real addict first to make that worthwhile.
Someone mentioned homemade lam grinders. That's what I use, I built mine from a 1/4HP motor I got for around $35, 3" sanding drum ($25), and a single sheet of 3/4" hardwood ply ($40 or so) ... total cost a little over $100 ... it's not made for high volume or professional work, but it grinds with suprising precision for a wooden machine ... typically within .001-.002 side to side, and within tha same margin over the length of the lam. I could definately use a better taper sled ... turns out thats a bit trickeir to make.