not sure which route to go down, basically i'll be doing 250-300 litres a day max when i get going with my set up and at first will be using my 600 ltr tank to fill at home and then filling my 25 ltr tubs for my trolley but will be buying a van in the next few weeks and plan on building a system out of that. now with all that in mind and my tap water is about 75ppm, do i go for an 300gpd ro with a small di chamber for £133http://www.ebay.co.uk/itm/251131623707?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649 delivered off ebay or do i go with 2 11 ltr di tanks that i seen on ebay that i may bet a little bit cheaper than advertised http://www.ebay.co.uk/itm/EMPTY-di-...omeGarden_CLV_Cleaning_CA&hash=item2333fc16e3 and finally a bag of resin for about £60-70. i had my mind on the ro but the more i think about it when i get the van set up i can just pump tap water in to the van tank and then straight through the di's without having to wait! only downside is having to replace resin. what do you wfp guys think?????