Thanks again guys for your replies - you've all been really helpful. Gonna go for a static RO and Di system with minimal amount in the van. Are they fairly straightforward to fit in the garage or will i need to get it professionally fitted?
Dont know about your storage, but would reccomend a 1000L IBC tank at home. Best to have more at home than not enough to finish the day (personal experience)
carpet genie, a tad off subject but is our skin falling off your chest in chunks or is that a fancy t shirt?