More builders on costruction with a price add on % of construction cost

I.. i already saw that this idea was suggested.. but i think is possible...

Price add for every new builder added on construction.

Idea: Construction Cost 100.000. Time 24H

With 2° Builder Cost: 20%/25% of total Construction (20k/25k Elixir or Gold in case) and time decrease for a %.. 10/20% like... Not proportional at the cost but always a little help. And if you take out Builder added you lost half price of the added.

The % of che cost add is always counted on the original cost. Always 100.000 in this case..


Like?