Yes the cost may be out of reach for most and at 100$ a dive definitely the personal device would have been the way to get to 80 or 90 dives!

In the end my son was helped by an HRT doctor who also specializes in hormones. he discovered and treated his low testosterone and low thyroid and a year later my son is feeling great. This doctor surveys every patient before and after 1 yr and tabulates the results. he has a significant base of data from his practice. something like this, even if informal, would help people see the potential for HBOT to help