And that's when you tuck them away in their hangers and save on all the maintenance costs needed after flying missions.

That's not how it works. Aircraft hate being grounded, and pilots need to constantly fly. If they don't, you end up with something like Iraq's air force, which on paper was very good, but they never flew their planes so none of their pilots had any skill, and they all just got butchered.

And that's when you tuck them away in their hangers and save on all the maintenance costs needed after flying missions.

That's not how it works. Aircraft hate being grounded, and pilots need to constantly fly.