I didn't think of that because I go through the 23 Gallons of Gray Water capacity every 3 days or so when seeing Patients full time.
When not seeing Patients I can stretch it out to 6 days or so.
Yes if I had a 30 gallon Black Tank a separate issue would be the increased frequency of legally recycling the Gray Water out of a separate & smaller tank.
Water that would be collected & dispersed out of a separate drain, not the corrugated common dump hose.
There is a work around here.
For me, prior to buying the Porta Potti of which I did a lot of research on , the 30 gallon Black Tank idea would extend by a multiple of 3, my Dump Station visits.
Although I occasionally use the Generator because its there, now that my Battery Bank has been reconfigured & the Solar/DC Fridge/Whole system is performing like never before, I would consider removing the perfectly running Generator, giving it away & using that space for a separate gray tank.
2005 Roadtrek Versatile 190-a super modified & efficient Lifted Rig with a reconfigured Battery Box with 2 x 225ah Lifeline AGM 6 Volt Batteries, 250 watts Solar, Victron BMV712 Smart Meter, Victron MTTP 30/100 Smart Solar Controller, Magnum MMS1012 PSW Inverter Charger & OEM Onan Generator. Plus...