I’m puzzled about worries about high minerals in RO wastewater. A typical ratio of wastewater to purified water is 4:1. The most mineral concentrations could increase (no minerals in the purified water) is 5/4, or 25%.
For planning a brewing schedule and whether to keg or to bottle, It would really help to have a good idea of the "window" of time for the best drinkability of any beer style. I don't recall seeing such information pulled together in one place.
It's amazing so see how some beers taste "good" just...