I built an online payroll service for Canadian families who hire staff like nannies or home care workers, or small businesses that wanted a very simple payroll

I built an online payroll service for Canadian families who hire staff like nannies or home care workers, or small businesses that wanted a very simple payroll solution. At the same time I had a day job. I wasn't raking in money but I had customers and my revenues exceeded my small expenses. Over the summer I sold the company and went to work for the acquiring company. In retrospect, this was probably the best move for me (I had considered taking investment to move to it full time.) Like one of the answers above, I don't think I could have grown the business significantly without spending more time on it, and for me (day job, 3 young kids) this was the only way I could have done it.