Game design flaw: Resource economy
Let us look at some number prove;
The total resource to upgrade say a iron mine to level 15 upgrade is as follow (taken from uranos's guild)
2.8 iron mine
2.81 resources
1. 100/80/30/60 0:03:45
2. 165/135/50/100 0:07:40
3. 280/225/80/165 0:13:55
4. 465/375/140/280 0:24:00
5. 780/620/235/465 0:40:00
6. 1300/1040/390/780 1:05:40
7. 2170/1735/650/1300 1:46:45
8. 3625/2900/1085/2175 2:52:25
9. 6050/4840&1815/3630 4:37:35
10. 10105/8080/3030/6060 7:25:50
11. 16870/13500/5060/10125 11:55:00
12. 28175/22540/8455/16905 19:05:35
13. 47055/37645/14115/28230 30:34:40
14. 78580/62865/23575/47150 48:57:05
15. 131230/104985/39370/78740 78:41:00
If you total up all the resource cost it gives you wood = 362950, stone = 261565, iron = 98080, crop = 198165. Taking 1 wood = 1 stone = 1 iron = 1 crop resource for simplicity sake, we need a total of 882760 resource to build a level 15 iron mine and the total time needed is 208.5 hours.
At level 15 the output is 2695/hour, meaning you will need 328 hours (13.6 days) to recoup the cost. Adding the 208.5 hours needed to upgrade it you will need a total of 22.3 days to BREAK EVEN.
You can argue that you can have level 10 tech to boost the output but that will cost you 1.023 million gold.... I think you can buy A LOT of resource with this money...
Lets take a look at the fort farming side of the story. I will give a very conservative number, assuming you farm 100000 resource a day that is 400000 total resource. (Remember that is no limit to how much you can farm a day...)
So when you farm fort you GAIN 400000 resource a day starting from day zero. If you build your in base economy you will need 22.3 days before you can start earning, even after that u can only earn 64680 (or about 100000 with tech) a day.
Given all the numbers I do not see a need to upgrade resource at all, just farm fort/inactive for your resource. I think this side of the game should be rebalanced. Make upgrading resource building more worth it or make fort farming gain less.
What do you think?