Living in a vehicle can cost as little or as much as you want. It depends on your budget and wants/needs. You can build a simple van for a few hundred dollars or a huge overlanding rig for hundreds of thousands.
An inexpensive, decent van build can be done for <$5000. My bus cost somewhere around $50k so far, including the vehicle.
An inexpensive, decent van build can be done for <$5000. My bus cost somewhere around $50k so far, including the vehicle.