Hi DC
It depends how much work you are going to WFP.
I think you will probably only get about 150ltrs a day from this r/o as its a pretty small R/O unit.
If you are going to use WFP all day this won't be big enough.
A 200 gallon a day would more likely be a better bet then you would get 600 - 700 ltrs a day from that
Paul