When building a business, especially a healthy one, you expand only when absolutely necessary.
Adding team members should be a matter of need and based on complementality of vision, ethos, competency and virtue.
Probationary periods are helpful, especially when first starting out. They allow both parties to test the relationship and give all parties involved time to adjust.
Our work is validated by tests and communication based on facts, data, intuition and virtues. It is not a matter of guess work for us and this method allows us to learn while we explore new relationships and business ventures.