What I'm getting so far is that, filtering ALL of the incoming water would be unnecessary and using an RO system to recycle water for drinking is possible (given the required power to run a pump when needed).
I'm planning on having a substantial solar system (900 Ah Battery Bank, 4000 W Inverter), so power isn't too much of a concern. Just looking at all the steps I can take, no matter how outrageous, to reduce my footprint and recycle as much as possible and increase the time I can boondock. While also keeping things compact within the RV.
I figured the pump would only need to run when refilling the freshwater tank and recycling the gray tank. Then I'd have clean freshwater on tap at all times, instead of running the pump to get fresh water. While also keeping the system clean. When boondocking, you never know how clean the water source is. Do you really want to clean dishes or yourself with that? (I guess that can be mitigated by soaps and cleaners, but still)