The branch circuit stuff around the shop you can do yourself. But when you get inside the Main Panel or have loading concerns, get someone who has seen it before.
They do make All-In-One panels that have dual Main Breakers - but it's a fairly new invention. They have a 200A Main Breaker for the 30 or 40-position distribution panel in that can, and a second 100A or 200A Main Breaker for a remote sub-panel feed. But when you do that, the metering section busses and the service drop conductors have to be sized for a 300A or 400A load.
I've worked on an old commercial building where they had a 100A rated enclosed meter socket (separate can just for the socket) and service wires. First they upgraded the main breaker panel to a 200A Main, then they scabbed on a second 60A enclosed breaker for a remote panel - and they were sucking 150A to 175A continuous through that 100A socket and risers. Got a little warm...
The only thing that saved them was the service risers were Type RHW Rubber, so while the insulation got a bit brittle, it didn't melt.
Would help a whole lot - but Do Not Post Binaries Here, you will make the gods of Usenet angry.
Most ISP accounts include some webspace, put the pictures there and give us a link here pointing at them. Or there's the Dropbox where you can put photos and projects. http://www.metalworking.com /