It's a bit of wild speculation but you don't need industry to save you time.

Solar concentrator (lens, mirror) can harvest large amount of energy.

Proper use of levers and gears can make you move tons with your fingers (although you need experience), see https://www.youtube.com/watch?v=E5pZ7uR6v8c and the likes

You don't need to reproduce horse plow with an oil based engine.