I planned on putting in a 3 bay pole barn / garage before winter. It was one of my pre-election projects but I didn't make it.
I changed plans slightly. My dad is 88 and still lives alone. Still independent but I worry about how much longer he can remain that way. Getting pretty unsteady on his feet. He is a bit too far away for me to make daily runs with any convenience. So I am strongly considering making one of the bays of the pole barn into an apartment for him. My house is 2 stories so he can't stay with me. Not to mention it would probably turn into a wrestling match at some point. lol
Anyway it changes the plans a bit, so I am holding off until I work out the details. I am thinking 40 x 28. I want to go bigger but it won't look right, proportionally by the house. 30 might fit but I thought 28 simple from a plywood dimension standpoint. I could certainly be overthinking that though.
Right now I am considering attic trusses. I plan on a 5 / 12 pitch with the rafters running the 28' way. I know that doesn't leave me much space in the "attic" but I am just looking for storage, even if I can't quite stand up straight up there. Not sure yet.