Mines cost 3000 to build and give 1500 if you sell. Smithys cost 5000 to build and sell back for 2500. Farms cost 1000 to build and give back 500 for sale. Marketplaces cost 2000 to build and give 1000 for sale. Marketplaces help bring in income every turn and are needed to trade items for bucks.
There are two upgrades which bring happyness, status symbols and fortress upgrades. The more people you have, the more a status symbol costs so buy them early. The fortress upgrades cost 10,000 and are 1 per turn for 10 upgrades. Fortress give +10 happyness, status symbols give +5 and are equal to or more than the fortress for a max of 7.
The way to with in Tic Tac Toe EVERY time is to go in the following places.
1**
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342
(number is which turn to put where)
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Play it at http://boredportal.com/?L=g.g&id=601

