Our homeless ride bikes if they have any transportation.
The close to homeless buy an old rv, park it for a few nights move them after they empty their holding tanks.
Too cold in Colorado and Idaho to be really homeless, so they come to California via one way tickets from other areas for the winter.
https://www.youtube.com/watch?v=KF7hWzqdPDk
This is the cost of de-decriminalization without concomitant enforcement of vagrancy laws.
The alternative of course is prohibition, which carries the penalties of warrantless searches, no-knock raids, asset forfeiture and other civil rights horrors.
The bottom line is there isn't any answer. Rather, there are only choices of how to manage the fact that some percentage of the population will decide that it's more attractive to get/stay wasted 24/7, even if it means sleeping in your own sh!t.
PS We live further down by the beach. I go for a jog along the river trail most mornings. I typically get cheered on by a few cracking their first beer of the morning.