Comment by jhenkens

Yeah - I think that is one of the critical pieces in his setup. He can have a (relatively) modest amount of batteries, and cycle through them as he's using all his tools one by one. In a big crew, where each stop every tool is being used non-stop for 30 minutes, then 10 minutes drive to the next home to repeat, batteries won't be able to charge enough. You'd probably need 3x the batteries in that case (which, per-person, is roughly the same I guess).