In the constant search of "outside-the-box" ideas on housing I started looking into van dwelling, if for curiosity sake itself.
I was actually disappointed on how expensive this type of living situation could be.
Consider this example budget:
http://www.faliaphotography.com/2008/11/my-cost-of-living.html
You could nitpick that budget however you want, but it's pretty clear to me that it isn't extremely cheap to live that way. I am currently at a ~$1200/month budget with a $200 student loan payment. If you factor that out I'm at about $1k/month. I'm soon moving to a smaller, cheaper apartment. That will pare my expenses down to about $850. That's only a few hundred over this person living in a van (not factoring in my student loans).
It just seems to me that this is not very cost effective for the sacrifices you'd be making. When you compare this to living in a cheap room for around $400-450 a month and not owning a car, it's not really any cheaper. With the van you have repairs, gas, insurance plus the cost of the van itself, which will come pretty close to the rent on a room.
I guess I'm just amazed that people would choose this lifestyle when you could rent a room and ride a bike around town for pretty close to the same costs.
I guess the same could *almost* be said for full-time RV'ers...except the level of sacrifice isn't nearly the same.