@stanzo40:
1. There are save games in the workshop of cities beyond 1 Million, where gamers provided examples of how a successful city can be done. (I strongly recommend subscribing to 'Manhattan Project' and check out that city.)
2. If you use powerlines indeed across the map, then you are assumable using mods since vanilla allows building in bought squares only. Expecting mod support from a developer may be a bit beyond the usual.
3. Did you notice that you posted your lines into a discussion of a building asset and NOT into the game's discussion board? (In that context, i am NOT a developer of the game even as steam indicates me here as a developer. I am ONLY the creator of this little building asset using the game's editor - and i have zero ideas nor knowledge of how to develop a full game.)