Ouch. I would look to DIY the single bay with the planned 2-post if you have time, some basic skills and some help. You could probably be into that for less than $1000 in materials.
The garage doors and electrical would of course be on top of that. Can you get the guy who hit you at $25K to just give you a quote on doing the one side so you can do an apples to apples comparison? What is wrong with your existing garage doors? They look ok and the tracks themselves can be modified to hug the ceiling and new jackshaft openers fitted. I imagine you could get the whole one side done for about $2500 if you DIY the framing, drywall, tape, mud and paint yourself and hire out the garage door track mod/opener install and the electrical work.
The only reason I am suggesting this is that $25K gets you a long, long way toward a separate, dedicated, detached shop that can be built to suit rather than retrofitted at every turn. A couple of thousand seems like money well spent to facilitate use of your space and a reasonable amount of money to dedicate to your hobby. Tens of thousands becomes harder to justify.
