There's nothing worse than selling to self-employed individuals. If we consider personal sales, i.e., B2C, then the person buys for themselves, their family, or as a gift, and each purchase is evaluated as "paid and got something pleasant or useful," and the main thing is that the pleasant or useful thing is subjectively large, and the price is subjectively small. In B2B - large and corporate - there are tasks and costs; if you solve tasks cheaper than they currently are, then everything is fine. It will be bought and implemented.
And something completely different is the self-employed - and I'm not even talking about the legal form, but any company where the head is a one-person orchestra without employees and delegation of operations is self-employment for me. Everything is perceived differently there; the person has already decided that paying a lot is expensive - perhaps the unit economics doesn't hold up, or perhaps it's just a state of mind. And they will evaluate the purchase like this: they will take part of my profit, i.e., my salary, for something that I might do worse but can do myself. Therefore, these will be the most difficult sales. Conscious self-employed individuals who calculate that the tool will bring more benefits and allow them to earn more are very, very few. So selling to the self-employed is difficult, and repeat sales or increasing sales per customer are very limited. Think 100 times before becoming a supplier to the self-employed.