WW: thanks for sharing and probably good idea to have a pro do the cement and bolt work so your metal would fit and you have a square building.
I'm not sure if you are going to have a compressor, but if you are you might consider putting it outside and running lines inside if you haven't already.
i'll sit back and watch because i'm always interested to see how talented guys build stuff. ask questions if you need help or just post a ton of pictures and let us know what you are doing so we can see your progress.
good luck
FYI. a few abbreviations we tend to use a lot are PIA which is what you just described about cutting those outlets into steel framing. POS (ask if you don't know), IMHO (in my humble opinion) are a few of the ones you see a lot and if you use we know what you mean.