We are building a new house.
It will have a three car garage.
The third bay will be my shop.

The house will have 200 amp service.

I'm going to have them run a sub panel - I now have a 30 amp sub panel & it is a bit small, so, I plan on at least 50 amp.
Should I or can I go up to 100 amp?

My wife also suggested that I have them run a gas line so I can put in a gas space heater. Good idea or not?