A written report from a home inspector can be immediately valuable to show the prospective buyers the condition of the home, often with more creditability than if the same information had been said by the seller.
A timely, coherent log gives you more creditability.
Getting certified at a studio that operates under the Yoga Alliance standards allows you to register with the organization as a certified instructor and enhances your creditability.
Your creditability will be enhanced with who-what-when and why references about previous conversation(s).