New tile claims get taxed after 3 days.
In general, you currently need to mine 120L/hr of any ore off of a tile to be able to pay for the territory taxes over a week. But, since you only have 3 days for a new claim, you instead need to mine 300L/hr of ore. This works for the time being because all T1 ore sells for more than 50q/L.
If you don't plan on doing mining, or if 300L/hr is too much, I would suggest downsizing to 1 tile for mining and industry, and keeping the other 2 tiles as HQ tiles.