im just about to swap over to wfp finally!
and im gonna be in the same boat as you for a while with having to use di only for a short period. money not the prob but space drainage and time is my prob at mo for an ro system.
wanted to know how long a 25 litre bag lasted you and how much water per week/day?

i guess you are fairly new to wfp then? ro is def the best way to go!
have you made sure you have room and drainage for this???
can you keep me updated on how you get on?