>>950692Not super hard, I just built one.
10 oz painters drop cloth, 1" steel conduit for poles, 1" tubing for angles, fiberglass welding blanket for pipe jack, diy propane tank stove.
Cost about $350 total, stove was all free scrap steel
Needs welding equip, and tube bender helps with making angles. Sewed it all on a little singer seeing machine.
Lots of work, probably wouldn't be easy to do it without welding.