This is what I was initially wanting to do, but getting the money side of it to work out is complicated. Not many businesses want to pay somebody to do this, even if they otherwise wanted to accept Bitcoin. And what they would be willing to pay, even if I was working 8 hours a day, won't make rent happen. At least if we're talking about small to medium sized businesses and merchants. I could be completely wrong about that of course, but that's my read on it. And unlike, for example, coding a new killer app, there's no chance that I am working for cheap now in the hopes of it making bigger money down the line.

Larger businesses might pay more, but then you're getting into long-term support contracts, complying with various standards, integrating with their ERP system, and getting a lot more complicated than "here's BTCPay server configured with what you need" or something along those lines.