This coupled with the already easy way to make a lot of money fast doesn't pose a big challenge for playing.
I think we all agree costs should be increased dramatically. The question is how much? I'd opt for at least a triple increase in cost to pose some challenge. This means that in the beginning you will really need to be careful where to build and what. You cannot just cut through a forest to make the perfect straight line, etc. etc.
Of course this will be a patch if/when implemented, to please the not-wanting-to-be-challenged players
