One of my first workshop projects is to pay for electrical upgrades in the garage shop. Currently, I have 1 20-amp circuit. I have zero 220 machines, but that may change in the future.

1. What do I actually need, electrical-wise, in the shop? I'm thinking two more 110 circuits and 1 220, but that's just spitballing.

2. What will it cost to add these to new construction? There is space in the outdoor panel, and the indoor panel. Both are located on the other side of garage walls.

3. What does it cost to add a mini-split AC? I live in San Antonio, and it's warm here 6 months out of the year.