Morning All, and happy Father's day to all that apply

I know I should have searched, and will later, but I did not know what to search for.
Here is my situation and question: I worked with an agent I have worked with many times in the past and just had the privilege of working with a client whose first question, after initial howdy-do and who are you's, was "If you miss anything that we find later on after moving in, what recourse do we have?" To me this means expect a complaint, claim or lawsuit.

How to deal with this type of client. He is a "maintenance engineer" which may mean handyman or janitor. He was asking about things like "was the sub-flooring adequately thick for a tile floor if the tile was added after the house was built"...

Just wondering a bit. I dislike working with these types of peoples and have even had the agents apologize for the rudeness of their client, after the fact.