I think a lot of people with a single family lot don't want to share a house, don't want to share their property, with a slightly more community based approach you can get your burn rate to 0 or even into negative numbers which opens up all kinds of flexibility. After the age of 15 I didn't have a familial safety net so I effectively built my own through modest and shared living long after the age it's frowned upon culturally.
“Remote area” = down by the river.
$6,000 per year is a long way from zero. That's ~20% of the median income.
Even with an incredibly spartan lifestyle, you'll have maintenance, insurance, inspection and registration fees on the van; health insurance; fuel costs (power when parked, gas when moving); phone service; gym membership (showers, bathroom); hygiene supplies/toiletries; laundry; clothing; household consumables; etc. $100/week seems like a stretch unless you're compromising on personal welfare and/or safety.
At some point you might as well just do away with the van and sleep in the office.