Whelp, I'm in the US.
Have lived in a pickup (a little old 90's toyota-great truck), a school bus, a stepvan, on the back of a bicycle, and now a school bus again.
There were a couple apartments and a few warehouses smattered between them.
I'd love to visit Australia someday, met some funny fuckers from there.
I do think the US lends itself pretty well to living in vehicles, as much as it is shunned. As long as you keep moving and present cleanly, nobody generally has a clue. But all our infrastructure is built for vehicles, and it's just...super easy nowadays, honestly.
Like I have constant power and internet. Garbage and wastewater is as simple as stopping for fuel.
Amazon dropboxes for buying bullshit online.
Homeless? Fuck no. I built this into my home. The state just wants me to have an address so they can send the tax man and cops in the door. Fuck them