It&#x27;s super expensive -- IIRC, Lava Mae was quoting $1 million to convert one bus into a bathroom and run it for a year. That said, getting approvals in SF to build a permanent facility is non-trivial and expensive in its own right, and it would only serve homeless in the immediate area (one of the features of Lava Mae&#x27;s approach is that they put the truck in different parts of the city on different days of the week).