Stephen King Universe

the bonuses should be worth different values based on how hard they are to get and defend
I would suggest you initially make it as below, then do some testing to see how balanced it is.

SUPERFLU should be 1 income
CASTLE ROCK should be something like 7 income
CALLAHAN and 'SALEM'S LOT both 2
MATURIN also 2, ROLAND should be 2
since LOW MEN / BREAKERS is just an extension of CRIMSON KING, LOW MEN / BREAKERS should be 2 income as well
same for FLAGG being part of MID-WORLD

(its a copy paste from a game chat, thats why it's phrased weirdly)

interesting