[chiefalchemist]

It depends, but it's likely a slight bit too small. If you're single, intend to be, and care bear the risk, it's doable.

Otherwise, if you hit by a bus (as the saying goes) you're screwed. Worse, your customers are left for dead. It's the morals / ethics of the latter that make such a size tough.

You want a size that can support two or three total employees. If you're going to serve customers you want some redundancy. Sure, others don't take such precautions, but that doesn't make it right.