As you get more and more land finding human(player) governor for all of them start to get complicated.
Would it be possible to add the option to buy the cheap governor bot(mayor bot) for imperials? Something like 10000 imperials per governor would seem fair to me. Would take over a month(42 days) to pay back for itself.
Or maybe add a campaign that reward governors? Like a buy able campaign at 125000 imperials that consist of 5 missions that reward 10 governors on completion.