Maybe I'll post pictures of ours on here at some point. 6000 square feet, 7 garage doors (2 are 12x14 for RV's), apartment (complete with AC, washer/dryer kitchenette, full bath and shower), welding shop, wood shop, 50/30/20 plus sewer and on the list goes. Main building is 40x60, 18' at the eves, and the shop extends back and sideways to complete the rest. Personally, I wouldn't go any lower than the 18' at the eves. Reason? Standing on top of a motorhome or fifth wheel while inside. Nothing like being able to wash your rig indoors when it's too hot, or cold.
John and Rebecca Dickson
Emma-7 / Little John-5 / Iva-1
Full Timing Again, Rev B
2013 Ford F-350 Lariat CC LB PSD
2015 SOB TT - With OC's Awning Poles (#8)
At least in Heaven, RVs will be perfect, and I won't have to keep fixing them.