Hi,

I’m just gonna confirm what Norfolk_Chris said. It is 20 min per step, from the forrester to the sawmill is one step.

I also recommend that you focus on 1 town per time in order to let the production level of the forrester and sawmill to increase to the point it haults it’s production. Which will take a while of in-game time since it only increases it’s production level by 1 unit per month (both of them increases by 1 individually).