Medicine is not for everyone. Choosing to pursue a career in medicine for prestige or financial rewards will likely be disappointing, as most physicians find that medicine is a vocation that requires a commitment to service, lifelong learning and the dedication to practice competently and compassionately.
Though in many European orchards the number of trees per acre is set at 5,000 trees or more, in the US the apple tree density starts at 450-485 trees per acre with a maximum of 1,100 trees/acre. This is a recommended number for the dwarf apple trees.
For anyone else thinking about planting an orchard for hard cider, here are some things to consider. It takes about 15 to 20lbs (closer to the low side of this range) to make 1 gallon of cider. The yield per acre of mature apple trees is anywhere from 12,000 to over 50,000lbs (when using extreme growing methods). Therefore in theory, you could produce about 800 to 3,333 gallons per acre of apples.