Although I'm reluctant to admit to it on here, my van is fitted out by Ionics. None of this ppb stuff though.
Bear with me a moment: The right sort of credit (no deposit) was tricky for me to obtain and I got an all-in deal for a new van with a delivery unit (I purify my water in a lock-up); they could turn the whole thing around in under two weeks (including sourcing the vehicle) saving me a few hundred on van hire and saving my body from more weeks of lugging a backpack around. Yes, I do think that Ionics' marketing is creative (to put it mildly), but they were the only ones around at that time that could get me what I needed with the least headachs. I accept that it will probably cost me extra over time, but the alternative was renting a Transit long term with no system. The extra I will be paying over 5 years is probably less than the extra I will be able to earn.
The big mistake I made was waiting unil my old van was giving big problems; it left me short on choices. If there had been more choices, I could have saved myself some money - but I didn't have money to lay out when I needed it.