Using a testing period leaves doors open, and doesn't create the trap that the new barn and the new mortgage does. If the working relationship doesn't work out and you have left an escape route, you have protected the family relationship. The alternative usually means one less family to come over to your place at Christmas. Communication skills are of critical importance for the successful transfer of a viable operation. Agricultural businesses are growing.
Larger businesses require teamwork and coordination.
People can't read minds, so they have to learn how to work together effectively. Watch what you say and how you say it. If you are going to work as part of a team, don't hurt your team members with harsh words. Provide constructive criticism, not abuse. As a parent, you are the mentor, and your child is the young entrepreneur and potentially your future business partner.