Erm...
Control Point: Same way Azeroth Wars Control Points work. You attack the circle of power, killing it and it comes under your control. There is only going to be roughly 20 control points
Housing Based: You build a building, in this case I will use the ogres
I want to limit it to 10 buildings of said base, like the Ogre Hut, The Orcish Domicile, Human Refuge. Each building will be upgradeable 5 times
Ogre Hut 1:10g per minute
Ogre Hut 2: 20g per minute
Ogre hut 3: 30g per minute
Ogre hut 4: 40g per minute
Ogre hut 5 : 50g per minute
Total income with 10 Huts at level 5 building is 500 gold per minute
And so forth for the humans and orcs
The income systems are not meant to be the only source of income, they are meant to supplement it, so as to not count any player out who only control one mine, or who has been forced into a corner.