UPDATE: We built a pretty cheap vacuum forming table, it's 12x12. If anyone wants to know what you need to make it, we used:
-8 Shoulder braces (for the frames)
-1 8 ft. Piece of molding (or any long piece of small and thin wood) cut into 4 10 inch pieces and 4 13 inch pieces
-1 Shadow box (this is the entire black box you see) you can get this from michael's craft store (basically a premade box insead of making your own)
-1 Peg Board cut into a 12x12 piece (the top brown piece)
-Liquid nails to put everything together and seal corners to make everything airtight
-Black paper clamps to hold the frames onto both sides of the plastic sheet when finally vacuum forming something
All we did was take the backing off of the shadow box, use liquid nails in each corner to ensure it was airtight,
then drill a hole in the side of the shadow box just large enough to fit the vacuum nozzle into it. After that then
we used liquid nails to put on the cut piece of peg board on the top of the shadow box. Then all that is left
is to cut the pieces of wood for the frames and attach them with the elbow braces and liquid nails into squares,
and walah! Done!
Finished Vacuum Forming Table and Frames: