That's what I ran out to my shop, typical trailer run stuff.
As far as conduit, depends on code I guess, I believe ours is 18in deep you have to run conduit, 24in or more you don't, something like that.
I had to get creative to add that 100amp breaker to my box inside the house, took some moving around. I'd imagine most 200amp boxes in older houses are pretty much full. I was never drawing more than 35 amps at a time out in the shop. Being the length and the tools he wants to run, I'd definitely entertain the new service idea. You don't want to worry about what you are running the house and out in the shop at the same time.
