Hey Charlie, Regarding your electrical, if you are serious about a welder you should price out just putting a subpanel in the barn. A 60A welder would require 4 gauge copper wire (I believe)but with a longer run might require an even bigger wire. It will not safely power your lights, so you will need another circuit for those. You can run a 75 or 100 amp subpanel and use aluminum wiring for the main run from the house then you would just need to run copper to your outlet locations. Probably crossing the line on DIY for the average joe homeowner, but not crazy difficult to do.
Hey climbnkev, thanks for the info. I had actually intended on having a professional electrician take care of most of that. After talking with one electrician, he suggested I have a second panel fed off of the service, rather than a subpanel. Should give me more options for barn power. Either way, it's outside my scope and comfort level!