That's just called a company my man...no, it's not easy to run, even if everyone involved is competent and you delegate things.
Also, as astonishing as this may seem to a lot of HNers, most modern economies are built upon SMEs. There are good, normal people working in small businesses all over the world. You could run an operation with half a dozen people and focus on technical delivery and strategic sales (I don't think you can ever delegate high-level sales). This poses its own set of challenges but it really is a middle ground between having to do everything as a sole trader and living stressed out of your tits trying to build a unicorn.