Building a Garage

2004 Supra 22 SSV. Height with tower up and light is 128".

We are looking to build a garage to store the boat and other toys.
It will be 30' (wide) x 40' (deep). It will have 2 12' wide doors.
I have searched several sites and was curious on what height garage door?
Is 12' door enough clearance without having to take the tower down or lower the air pressure in tires?
I have read about others disconnecting the door from the opener and having to pull it back and secure it to get the clearance.

I don't want to have to do any adjustments, just back in and unhook.

I would have ~ 1 ft of clearance between the 2 measurements, but I figure the 12' is rough opening, so if the door fully opened takes 8" away, may be tight...

Thoughts or experiences?

I have a 12' tall door and my X2 fits in with mucho room to spare, at least a foot, probably more. Door is 18' wide so obvoiusly no issues there, but I've backed my trailer into a 9' W door and it fits by a gnat's ass. 12' wide would be no problem.