I think it would be alot of my sons working on separate projects at one time. With me working on things here and there when not helping them at different times. We blow breakers all the time in our garage with their projects. Not uncommon to have the grinder, compressor and welder plugged in at one time for one project while the other one is running a separate grinder or a drill press.
I would opt for the 200 amp service if you can pull it off. Not having enough juice is hard on the equipment. Arc stability while you're welding, a compressor trying to re-start etc. Lights, fans, fridge, a heater? It all starts to add up.
