If trees are tall, you have to be there or the trees get damaged. Resulting trees will start to produce fruit in three to four years. Disadvantages adds one to two years until production commences. When crab is two to three years old, ends of main branches are budded to good apple. Advantages hardy tree, less chance of winter damage, shelterbelt requirement minimal in first few years.
Disadvantages adds three years to time of first production.
Purchasing Grafted Trees - Trees are one or two years old and grafted on hardy root stock. Advantages - less work, earlier production. Need shelterbelts from time of planting for protection. Farmers Market - Selling fresh fruit or apple products like pies, juice and cider may increase profits. Advertising - seems to spread by word of mouth.