Money Problem

[Raiuga]

Ok, I'm a noob at EB...I know that

but...

I presently playing with Koinon Hellenon and I have a constant problem having a positive income. I can't recruit any significant units because it will ruin all my economy. Then I see Epeiros and Macedonia fielding huge armies of elite units but all of their cities have negative income...How can they do that? Here does their money comes? Is this supposed to be like this? Or am I missing something?....
I played RTW original and it wasn't like this (at least not so evident)

Please help this little noob