Great question — answering as the UphillTech team:
I converted a 3.5 tonne Transit medium wheelbase a few years ago. We designed it for use mainly on campsites, but I've done the odd night in car parks in the UK. Campsites are preferable if you're spending more than one night in it, but full time van life is not uncommon here. Mine is big enough to have a retractable double bed and a kitchen with fridge, sink, and (when you've got mains power) oven/microwave. It's also got a toilet but no shower. The cassette toilet (look then up) has its own tank for flush water as well as a waste holding tank. Fresh water can use a tank built underneath, or in my case a 25l container in a cupboard. Either way it's pumped to the tap. Waste water goes into...
Full answer by Chris H - UK: https://travel.stackexchange.com/a/186136 (CC BY-SA 4.0).
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