Re: Stray cat returned - Very Sick
Sounds like he's in dire need of medical attention, and if you and/or your neighbors cannot afford to provide that, then I would be on the phone with local rescues to see if they offer help in situations like this.
I know the last rescue I volunteered with offered assistance to owners who couldn't afford the medical bills, and also helped foot the bill for strays that needed medical attention, as well.
Perhaps even call around to local vets to see if any of them are willing to help the little guy out. I've seen some vets take in strays, get them better, and adopt them out through the clinic.
Not all places provide these services, but it's definitely something to look into.