Ready to expand my business

The Piper 6x Aircraft is the best cargo plane I have ever flown. I transport about 600 pounds of cargo 5 and 6 days a week and this plane flies great and even allows me to take a passenger with me. My earnings with this plane is great and paid off the plan in less than 2 years. I may consider a second plane and a hired pilot go expand the business. There is alway more cargo than I can handle alone and why give the business to someone else if I can get another plane and pilot. Am talking to my shipper to see if I can contract for double the contract load for at least 3 years to cover the cost of the second plane.