to Developer: Thank you for your response my friend. I can choose now all upgrades BUT in cold water storage and in all hot water upgrades the costs are zero so you can buy for free indefinitely. Also the price of hot water is zero. That is my problem. (I already have profit 2.14 Qi from cold water and I own hot water pumps, heating and placed pipes but income from hot water is still zero)
If operating costs are lower than 0.005, they are rounded to 0.00. If you buy 1000 from that thing there will be some cost. If you go to hot water tab in overview it should say heat water price 10.
to developer: this game has potential. I love the new feature hot water but for me does not work (I have no profit) only expenses! Also upgrades work only for cold water, I cannot choose any other. But in general keep trying, fix the bugs, the game is nice!!
It works. You need to have a solid profit before starting with hit water. Otherwise you gonna need a loan. If you have like 1k or more profit per hour you can start with hot water. You can do it earlier but it is on your own risk. The bug with the upgrades is fixed. Glad that you like the game :)
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If operating costs are lower than 0.005, they are rounded to 0.00. If you buy 1000 from that thing there will be some cost. If you go to hot water tab in overview it should say heat water price 10.