Finally we have figured out an ideal scheme for the game. This clever scheme shows the basic relationship between players' resources, army and the map.
Firstly, player should know that he will be doing convoy trades with the "OWNER". He will be transporting goods (R) to the border of the map, eventually receiving money to build an army. The scheme shows the full cycle. Some maps wouldn't have some resources, but this will not damage the gameplay, since, even if there is not resources at all, player will receive x $/sec, which still, could not be compared to a trade.
Note: the fun part starts when you have two players and one map.
Sorry for the lack of graphical content.