With more and more single parent families and two-wage earner families there is an increasing market potential of people that do not have the time for mundane laundry chores. There is no outside selling required. With proper marketing, the customers come to you. Once they have tried your service and superior equipment, they become very loyal and quick to tell their friends about you. The only outside selling would be if you chose to develop commercial accounts, valet service, and the like.
Good equipment is designed to last for many years.