Go full hydro..collect your waste water and set up passive distillation using solar power to reclaim clean water. It's an idea I've had but haven't looked into the feasibility of it. Outside, black plastic(food safe) holding tank, old nute solution is pumped out..solar heat evaps water, which is collected and distributed to a clean holding tank.Biggest issue would be the nute holding tank would need some periodic cleaning to remove the built up nute sludge that would be left over after distillation.
another idea.. Build an "exhale room" similar to a "lung room", where humid air can be dehumidified, recapturing some water ( economical?..IDK). A below ground room( basement) could be used to passively dehumidify the air if there was a great enough temp differential.