Just my two cents but,
I would never go with a 10' or 12' door. I had a 12' and just did not like getting the boat that close to the metal sides. I had Overhead Door build a 25' wide door and cut out my brick siding. Installed it was about $9600 but it leaves ample room to back in without worrying about getting a little sideways. I have a 37,000+ foot building for my business that I park my boats in the winter and it is fully heated and cooled. I had a contractor come and build a covered area 50ft deep with nice sheetrock walls and ceilings to keep the new boat away from my employees who think "it must be nice to be the boss". I prefer they do not climb on and scratch the gel. Good luck on your shop. There is nothing like having a conditioned space to work on your toys.