One of the value adds a consultant/advisor brings is familiarity and convencience.

Let's say I want to improve the SEO ranking for my website. I can solve for this myself, probably it will take me a few weeks, but I can eventually get there.

So in many cases, the answer is not impossible to be responded to, but your value as an advisor is that your know how is at hand.

So as much as possible yes! that will buy you credit for the times you will not be in a position to respond to the question immediately - either cause you are otherwise occupied, or because the response needs research time.

So use those quick wins to your advantage. By the way, you can answer so quickly because you are knowledgeable, not necessarily because the question was an easy way.

Your clients, will learn to appreciate that it is not a given to get such immediate service