SD: your garage is looking great. I bought a house that was built out of cement block 30+ years ago and i'm still living in it. i've put on two different sidings cause first LP siding was a bust, but the hardie plank looks pretty good now.
not that you have time or funds at the moment to side the outside of your building, but if you do gluing and using framing 1.5 inch nails will hold on the 1x4's so you can put siding up if you want to some day. here's a few pics.
nice work on the garage doors and it looks like you might have found some old growth wood for the framing. also the front door looks solid, but I might have centered it, but if you like it that's all that counts or new siding will fix that down the road.
keep up the great work cause you can't be getting much sleep with all the work you are doing so hope you are getting some.
in case you have to do any drilling i just picked up a couple (milwaukee & dewalt) rotohammers with a bunch of SDS & SDS plus bits that work great compared to the old concrete bits and a half inch drill.
good luck!!