Larry
After purchasing the machine mentioned for $2,500.00, I built 2 less elaborate Hydrogen Generators for less than $100.00 each. I am sure that with the inflationary period we are going through, that they would now probably cost around $125.00 to $150.00 to build. Both function as well as my expensive machine, but are not as eye pleasing. If you would like for me to send you the information and photos of how to build one yourself please contact me through my private message and I will gladly send them to you. The ones that I built were made using 2 inch PVC tubing and caps, and 2 inch round 316L stainless steel plates. cut for me at a local machine shop. You will need access to a miter box and saw, either electric or manual. A drill press and bench vise would be almost a necessity. Maintenance of the machines is minimal. Depending on their storage size, they do need to be refilled with distilled water after varying hours of operation. They do need to be internally cleaned and refilled with NaOH (sodium hydroxide) and distilled water once a year. The cleaning process is relatively simple and uses iodized salt and tap water for the cleansing. I will take photos of both the machine I purchased, and one of the ones I built, and post them later.