Ummm, you will notice that, as minimalist and inexpensive as my van setup is, I am not really missing many of the usual conveniences that other van dwellers have who have spent a lot of time and money installing fancy cabinets, sinks, kitchens and beds. My bed is more comfortable than my one at home, and I have solar power AC-inverter so I can run lights and computer. Plus I personally don't want to cook inside my van in any case.
Also, unless they have a complete van conversion, most of the other van dwellers do NOT have shower, real toilet, or head room to stand up in. Plus, after they put in all the cabinets and what not, the open space is really small. Floor space disappears fast in a van. I have 3'x6' of open space.
About the only real convenience most dwellers with "basic" van builds have that I don't have is a frig, whereas I don't have enough solar for that so I just use a cooler. I have 100W of solar, and it would take probably 300W minimum to run a frig.