Shop insulating advice

Phreakish said
The only reason I've piped up is to maybe give you some ideas as you go and things to think about in case it fits with you goals.
Your plan will work, but there's potential for issues depending on your exact climate. The best I could do would be to look st maps and regional hvac chats, but that doesn't fill in all the blanks for a perfect job. If something does happen, it won't be anything that can't be fixed later though. So, keep on it and address **** as it comes up. I'd rather have to spray every peice of steel in the shop with fluid film than freeze my nuts off doing a January cam break-in again!
I've been down similar roads before and burned an absolute ***-ton of time and money trying to save things not worth saving a while destroying my back and shoulders. At some point you sit back and ask "why didn't I!?".. Or not, ymmv!

I really appreciate your input, everyone’s input. It is good to learn about this stuff. You all know way more about this than I do that’s for sure.

Fun story-
Had a patient today. I asked Him if he kept warm this weekend and stayed inside. It was 0 degrees to 10 degrees all weekend. His response - I was working in my shop all weekend. Well conversation ensued. He has a 30x something pole barn, 1.5 foam board on the walls and roof and a small wood stove. Said he wakes up, goes outside and lights the fire, goes inside eats breakfast and drinks coffee. After 2 hours his shop is 50+ degrees and he was able to work out there all day with some warm clothes on…

That’s all I need. I don’t need and cannot afford a climate controlled time capsule mopar holding facility…. My cars aren’t that nice lol. Maybe after 30 years of being a dentist I could afford something like that… but with the way inflation is going probably not lol.