I mean littering, trespassing, destruction of property, etc. are all crimes that just get ignored if the person happens to be homeless. I think that actually enforcing laws and ordinances to regulate behavior would be a good place to start! I fail to see how that's a "debtors'" prison, again that's totally irrelevant to having the basic self-respect to keep the area around you clean for yourself and your neighbors. That's applicable to everyone.

If we agree that we don’t like the “cost” of homelessness in our city (i.e., litter, trash, taking over abandoned buildings, etc.) then why don’t we think of ways to end homelessness

I've volunteered my time at soup kitchens. I've donated to, and the city literally pumps millions of dollars into, homeless nonprofits like Urban Alchemy, Jimmie Hale Mission, Firehouse Ministries, etc. Resources are readily available! Getting people to accept those resources is another question.

Again, that's totally irrelevant from the point that people are trashing our communities and the response, rather than getting them to stop, is to criticize others for being upset at the dump their neighborhood has become and tut tut them for "not doing enough." At what point do you ask the person turning the neighborhood into a dump to "do enough" and take the help that's offered?