Harbor Freight has a nice little bench top blast cabinet that would sit right in that spot for $125. I've had pretty good luck with mine. I recommend sealing up the seams with caulk or Permatex because they leak some dust. I use my Shop Vac through a water bucket to collect the dust, and a painter's clamp light on top so I can see. If you don't seal your cabinet up real good, you'll have grit *everywhere*! Even with my cabinet, I still get some dust and grit in the garage, but *nothing* like blasting without it. I used a cardboard box lined with duct tape to blast a rear end in the garage about 8 years ago. It took weeks to clean up the mess. For a one-off job in the winter it was OK, but next time I'll just wait til spring and blast it outside.
