This grow tent is made from a wood base with a PVC pipe frame. The frame is covered with foil insulation. The wood frame is about 3ft x 3ft. It is lined with carpet and 6 mil plastic sheet. The bed is about 8 inches deep with about 6 inches of pea stone. The bed is mounted above a platform so that the nutrient tank can be placed under the bed. The wood frame is on rollers so that the grow bed can be moved around as needed. These photos are just suggestions. The grow bed and wood frame can be and shape or size.
See the following video: https://www.youtube.com/watch?v=J4nmEw4Q4kc&t=156s