Get a plan, put it on paper, STICK TO THE PLAN.
Grow what you will use on your jobs, and sell the rest, Learn what you can grow and buy what you cant, increase you inventory every year, but only if you use and or sell everything you can grow.
You might decide you want to grow flowering shrubs instead of trees. You might decide on bareroot liners instead of finished material (quicker turn)!
Stick with your PLAN