That is understandable, Cysto.
But if you shoot straight up to level 110 with something like Training Grounds, Coal Mines, or Freight Train Stations, it's going to take you months to convert everything over to IT Centers without using a lot of gold.
I simply had Gas Plant Facilities for all of my structures except for two, (oil for the units), and then converted over when possible. It is just a matter of simply progressing up to better and better bases as you level, but balancing out those purchases with units as you need them. Just never forget how important a good base income is. That's the main thing.