Tesla:
Without a bunch of details, T&M worked financially well. Kept 3 men busy, all billable. If I had my tools, my T was billable also. I had long term clients who didn't want to 'shop', 'bid', or 'go cheap'. As for material runs (when necessary) no issue on the T either. Most materials were delivered by a local supplier, or from shop stock. The local supply house had no problem with 'rush' deliveries.
Think of it as a company that outsourced the electric shop, and had a contractor 'on call' at controlled cost agreements.
