I wanted to grow a service business, and everyone will tell you that service businesses don't scale for any number of reason. I grew my consulting business by identifying stuff my customers really needed, was teachable, and had great margins. Once my customers saw the value, I switched from hand to mouth survival waiting for invoices to get paid to working for upfront payments. With cash in hand, I could hire people to so the work as fast as I got the business. Maybe my business wasn't infinitely scalable, but it grew way bigger in a short period of time than anyone expected :)