Personally I would wire the shop for 220v. Lots of good tools require
220v, like decent welders, air compressors, hiher end woodworking
tools.

If you do it your self apply for an electrical permit at you local city
goverment, and do it right. Or hire an electrician to do it. What ever
the case don't get hurt or burn your house down. Choose the appropriate
wire and breaker for the current you need.