Some shop items i used:
Shop is 50 x 84 x 14' high. White liner steel on ceiling. 1/2" OSB painted white on the walls. R24 blown Cellulose in walls, R50 in ceiling. North facing 20 x 12 and 10 x10 overheads insulated, windows in the big door so i can see what's going on. 6" slab throughout. I can drive the 21K forklift anywhere and not worry and 6" fiber over 3000 psi is plenty for a lift.
I did framed walls 2' OC and striped the outside for the steel. Makes for much better cavity to insulate. No insulation other than foam likes to be on its side for 8 to 10' stretches. Roof trusses 4' OC. Make sense with framed walls, roof perlins can then be 2 x 4's flat on top of trusses.
Used 8 5' x 3' sliding windows 8' up on the east, south, and west for natural light. Decent vinyl Low E.
When it got to -25 here last winter the coldest i saw in the shop was 38. Most of the time it stays around 43. It didn't get much above 75 in August. I keep the doors shut as much as possible. I put 2" foam on the inside of the frost walls and under the outside 4' of the floor. I I have slight regret for not doing the whole floor. At the time 2k more cost seemed like a lot. That was b4 I added everything up, not sure 2k more would have really mattered. I get a little floor sweat.
I run a dehumidifier for a bit in late spring and early summer to combat the humidity difference, again I mostly keep the doors shut. I have an opener in/on everything.
I have these lights,(they have actually bumped up the lumens since i bought) they put out great light at a good price.
I have this exhaust fan, DELHI AX20-1V Exhaust Fan, 20 In, 115/230V, 1/3hp, 1700rpm CANARM. Sucks the walk door right out of your hand. Have it on a variable speed controller.
For heat I used a 250K BTU Modine. I don't keep it on all the time so forced air on demand is the only way to go for me. Probably overkill on BTU, it was hard to get a good answer going in.when the fan runs i can feel the air move in the opposite corner 90 ft away. I have a 200k also that would have done the job just fine. It heats up to 55 - 60 in no time. 2 ceiling fans help push the air back down. With the size of the building and the solid insulation I think the expanse of concrete keeps the middle at a fairly constant temp.
My .02 anyway.
And for the house, most good ideas have been said.