I assembled my own vacuum bagging system after seeing a couple in our area. I bought a used Gast vacuum pump for $75, a couple of check valves (I only needed one), a vacuum guage, a vacuum switch, and some tubing from the hardware store. I also built a reservior out of 3" PVC pipe with a couple of endcaps. The switch wasn't cheap at about $30 but everything else was and I doubt that I have more than $125 in it. It works great up to about 20" of vacuum which is more than enough to crush white beaded foam and still sufficient for the denser ping and blue foams. Whether you build one or buy your own, it is well worth the effort. It will end delams (as long as you spread your adhesive evenly) and it is actually easy to use.

As far as supplies go, I really like the vacuum bagging material that comes in a tube, it is easy to put a sheeted wing into the tube and seal the ends with clips. It is very easy to get a good seal using those types of bags. Those 2 items are worth the cost. For saving money, it is easy to use paper towels as breather cloth around the perimeter of the item being bagged. I bought some peel ply but haven't used it yet.

I've seen some pretty good deals on vacuum pumps on E-bay.

I've never used polyurethane glue for sheeting a wing, I stick with epoxy. It has a proven track record with me. I have heard of people successfully using Probond though.

Good luck,

Kevin