I wanted to get into cave diving and tech diving. But I live in the backwoods of Appalachia. I couldn't even get my cylinders filled within a 2 hour drive. Hardly the place for a tech diver. I either had to move to a more dive-friendly location, or turn my garage into a tech diving center.
I did the latter. I dove solo in deep, dark, cold Appalachian reservoirs, where the visibility was 6 inches to 2 feet, and I perfected my dive skills.
I set up a fill station in my garage, with continuous and pp blending. I inspected and maintained all of my own gear, regs, cylinders, valves, and the fill station.
Of course, I had to buy all that equipment and all the necessary tools. I had to attend all those classes that taught me how to use and maintain all that equipment, and how to run a fill station and mix deco gasses.
I'll let you guess how much all that cost me. Yes, I did complete full cave training. It was worth it all.