I don't know if you saw, but I posted above a spreadsheet with most important buildings and their costs: https://docs.google.com/spread…YAFPArc4/edit?usp=sharing
There, I used all the reducers as level 50, so you can easily calculate the cost of bringing a new colony from scratch to a fully productive town (in terms of resources). It is enough to reach TH 30 with Museum 15 and Tavern 35 to allow you to fully send the workers to mines. I also included all the L50 reducers and L25 boosters.
With my calculations, all you need is ~42M resources. So, my above estimates are quite accurate
Of course, numbers changes when we plan to expand from 13 to 14 cities.