DIY Hot Tub 

Watched from a Reddit post. I built my own hot tub as well. I used the old blow up hot tub unit and connected the air blower too the bottom of a 3x4 food grade container. I put the rest of the machine hidden in stairs beside the container then wrapped it all in insulation and then barn wood. The in and out lines connect to the side then run to the tub connections I cut out from the blow up tub. The air ring is done with pvc with holes. I mounted the folding top controller to the top of the stairs so you can reach it while in the tub. It fits two people and has been working The coolest part compared to your build is I can empty mine and it has the skid movable bottom on it for relocation.

Really cool! I would love to do something like this in Alaska but our ground shifts too much when it freezes. We had to go above ground. Anyway, your tub looks great and the yard ambiance is on point.

That is really impressive. I'm happy for you guys