'Saving' money over this can potentially cost much, much more later.
Truth!
Probably no one here remembers the "good ol' days" of medical electrical and electronic quackery... it was a free-for-all of unlicensed practitioners using questionable devices to "treat" patients for every imaginable condition or disease. Testimonials abounded. but little scientific evidence for the efficacy of the machines was provided. Training was non-existent or consisted of a few hours (at the most) of a demonstration/sales pitch. X-ray and diathermy machines were unregulated. Induction or "shocking" coils seemed to be popular, probably because they were cheap to make and produced no lasting effects, other than by the placebo effect. When the U.S. Government decided to regulate the market, set standards for performance, and require a medical degree to prescribe or operate the equipment, things settled down a bit.
For example, shoe store fluoroscopic x-ray fitting vanished, virtually overnight. I remember using one in the early 1950s when my parents fitted me for new shoes. I was not tall enough to peer through the eye ports to observe on the green fluorescent screen the x-ray shadowgraph of my feet inside the shoes, but my parents were. So I got a pair of well-fitted shoes.
Today, with image-intensifying and digital image capture "screens," the x-ray radiation dosage would be quite small and probably safe enough for several dozen "shoe fittings" per year. But, AFAIK, no one has tried to market the new technology to shoe stores in the shopping malls of America yet... probably because it is difficult to find a shoe salesperson who also has a medical degree and a license to practice medicine.
Another therapy I wish I could purchase at a local hardware store is a muscle stimulator. I was treated with one of these after I broke some bones in motorcycle accidents. Very pleasant experience, but the only source of similar equipment available today appears to be in the form of an electrical sex toy... no doubt sold as a novelty item for amusement only. Similar to a TENS unit, that I see is now available for sale off-the-shelf and over-the-counter at Walgreens and online through Amazon and other retailers.