In my case this got started when California introduced background checks for ammunition and I had to make a 50 mile round trip to pay someone $25 to hand me a box. So I started reloading again after decades of not doing it. Then I looked at the hazmat fees that prevented me from buying single pounds of powder, and I started making that.
And then making powder, primers, bullets and crafting ammunition became a lot more fun than actually using it. I used to spend $12-15K a year flying and now I'm on medications that prevent me from ever doing that again. Saving money isn't an issue anymore.