I have a 36x60 with one door on each gable end that is 10x9 high. I did this so I can drive right through and around. I have a pressure wash station and drains on one end. I used R19 commercial doors. I try not to have one or both open for too long as I want to keep flys and insects...
I got the Menards shelves. Bought some thin 1/8" hardboard 4x8 sheets. Easy to rip and smooth and put on top the wire shelf so stuff does not fall through. I like the fact Performax now has some clip on brackets as well.