Wanting to build a garage (Need advice)

I have a 2 post Rotary brand lift that was made here in the USA. It has a minimum height requirement of 11 foot 8 1/2 inches. If at all possible I would have a 12 foot area where the lift goes.

As far as your roof 24 inches on center is too far apart when you are spanning 26 feet as far as I am concerned. I have seen too many roofs sag that are on 24 inch centers even when using plywood. What is your snow load? You need to figure that in when you are doing the roof. What type of shingles are you using? Three tab is cheaper but a good quality architect shingle will last a lot longer but also weighs more.

Todays lumber is grown too quick and isn't like the wood of 20 years ago. OSB has a weather resistant (not weather proof) glue and standard plywood does not.

When you pour your concrete use 3500 or 4000 pound concrete not the 3000 pound. The heavier concrete will make a much stronger floor and footings.