I wasn't aware of any other organizations building homeless shelters without plumbing or any permits/etc. in random suburban backyards...
I'm aware of that. That's why I said "properly zoned"... I don't think this shed is a particularly great idea but was commenting on NIMBYism more generally. The point is that these shelters need to be built near somebody, right?
Halfway houses and properly zoned shelters get built in low cost areas of town, because that's what's economical to do, and the neighbors won't bitch as much about it. Locally, Thry are mostly in semi-industrial neighborhoods, so the shelter is not literally next to family homes.
However, halfway houses and homeless shelters are vetted and supervised to some degree, which gives some kind of sense of security that you're not going to have a schizophrenic homeless man leaving Big Gulps full of urine in your yard and masturbating at the neighborhood park.
These do not.
People in low cost neighbourhoods still complain about this stuff too. As property values start rising in an area they often want to kick the shelters out. I also don't see how it's particular moral to say that it's fine to put them in low cost neighbourhoods because the housing values are already lower/people will complain less and to say it's not ok to do the same in a rich neighbourhood because they'll complain more or because their houses are worth more. I get that it's impractical for these organizations to fight wealthy homeowners, but I think this stratification is an ugly side of society.
Edit: I forgot to mention that I think your assumption that homeless people would leave big gulps of urine on your lawn and masturbate in public, or that them possibly being schizophrenic is a huge safety concern speaks volumes as to why we have this problem. If we could get this ridiculous caraciture of homeless and/or the mentally ill out of people's heads it would work wonders.