...In one test game I played I took out one civ near me pre-0AD and with just my 2 original cities and the AI's cities (he wasn't that far away from me either) I was in the red at 0% science/espionage. I was able to recover but I definitely couldn't have gone after another civ for a while, especially considering the next civ would have been even farther away and had even higher maintenance. I'm thinking cottage spam will be necessary even for a military victory.
I'm probably going for a space race since I consider myself weak at fast military wins.
It's true in my test games barbs have had an extremely minimal effect, and yes it's a flat map unless DS changed the default setting.
Is it possible to let the barbs take over a city and thus rid yourself of the maintenance costs ? And I wonder if a city the barbs take can culture flip back...not sure how that setting interacts with barbs (if at all).
cas