I think it would be smart to have a menu where you can see how many resources and gain/use every hour.
It will help you to find the balance between how many resources you gain, and how many you use, for er period of time, IMO it should be ½ or 1 hour.
If you have deficit, you can see how long it will take before your resource f.x. Bronze, will hit 0.
If you have surplus it will also show you your surplus every (hour)
Best Regards
Boombalar