I'm going off the automaton shop taking months to build each unit, even though the computer shop is the one to build and program the computer. A mecha is just an automaton that replaces the computer with a cockpit so shouldn't be any faster.
I'd replace the lumberjack team with a steam tractor with a circular saw.
I'd replace the lumberjack team with a steam tractor with a circular saw.
Plus, no chainsaws or mechanized drills/hammers without a steam engine.