Rog,
You are quite welcome to the odd cup of water :
Get yourself kitted out with van and WFP system and all you need do is drop around after work and fill up your tank, if you have a van with a 350l tank I should just about be able to keep you topped up.
Slip me a fiver a week and we're sorted
You can then work on ideas to get yourself more self sufficient.
Maybe Emma's parents will let you source a tank at their place?
You could even get an IBC tank and put it next to the one I have, currently I'm not on a meter, so water costs are not a problem.
Our water pressure is 85psi, so we might even be able to run two R/O's side by side, or, failing that, set up a booster pump.
In time you might find you can affort to upgrade to a more expensive 4040 R/O and connect it up for an hour or two to fill up at home.
With a system fitted in the van it also gives you the option of connecting up to a customer's outside tap and filling up as you work, or have your lunch break.
We can soon get you started dude
Ian