I don't think this will be that big of an issue. Condensation is such a big issue because we camp in relatively small volume tents. Our exhaling breath can quickly and significantly increase the humidity of the environment. What you are talking about is a much, much larger volume and it will be that much more difficult to alter the humidity. If you were to construct the tent of a non-breathable fabric like plastic and really effectively seal in every exhaled breath, you might have a problem.

Also, you are not going to have a condensation problem when you are not there (and therefore not exhaling into the tent). Long term the biggest damage to the tent will be from UV light and extended time set-up in rain/snow (particularly problematic if moisture is getting trapped anywhere).