I can show you a photo but until you hold the formed sheet in your hand you don't know how powerful this thing is. It's professional quality. And you can build it for far less than you can buy a machine. And since Vince will reveal his experiences, you should be able to adapt the design and scale it up or down.
Construction is simple, with some welding being required.
Being built on wheels makes the machine easy to move from place to place. Of course, thicker plastic takes longer to reach forming temperature. Temperature is controlled by an infinite range switch mounted in the control panel. Everything required to build the machine is easy to find except for the 120 volt heating element. The vacuum for the machine can be supplied by either an air venturi pump or electric vacuum pump in conjunction with two storage tanks.