I perused both the links you provided. The sauna sounds like a good one. A couple of items mine doesn't have is the controls inside or out, or the window that will open. My sauna is made from poplar tongue and groove inside and out, the poplar is sandwiching pressed wood. I didn't know this when I purchased it. If I am getting gassed, I can't tell. Cedar saunas burn the eyes when heated. I guess you have to contact the company to get a price quote. I have one of their water machines.
I assume you've had some tests to determine that the PCA-RX, NG-RX, AF-X are doing their jobs. I understand the importance of treating the parasites, metals, and bowel fungi. Does these three products do that?