- A corporation. Not like "I'm rich and I bought a whole existing business". Having a lawyer create an empty corporation and then buying it, so I can start a business. It was under two thousand bucks, not even the most expensive item on this list. Made back many times the cost.
- The Huawei D15 is a good laptop at an excellent price. It's paid itself off many times over.
- The Honda Air Blade 125cc 2021 model. Reliable transport at an excellent price, that has paid itself off several times over.
I also bought a used DSLR (Nikon D3200 for ~135$) to better document stuff I do, as a form of marketing. I pick up used, antique lenses for cheap as I encounter them. It's been profitable and generally great, but doesn't make top 3.