Will try out all of your recommendations on the next set! Thanks guys :)

@fazer I was trying to do that last set, the problem is when I sell my military units I become very vulnerable to attacks :((

Been selling about 2-4 times a day. Exploring too. but the problem is with negative income, I start to panic when I see those red numbers :(

Have tried 3 sets using Indy strat in Express server. Followed wiki's advice but in the middle of the game I cant keep up :( Any help guys?