Getting power to the new shop
If the ultility will run 1/0 AT (alum. triplex), that will support 300A panel. Maybe more depending on thier specific rules. You will typically need a down guy on your weatherhead for that heavy wire. #4AT will typically support 200A.
A 100 amp panel will run a 1800 sq ft home with a/c in a hot so cal climate with continuous 100 deg days.
The machine motor load, welder load and car lift load don't get added altogether at 100%. Usually it's varying percentages. And that is a commercial shop method way of adding that stuff.
You have a residential garage. Just a large one. Does it have A/C in it? If so how many tons?
