Found male sm.blk.male dog (San Antonio)

Sweet as can be black male dog still intact with a blue collar on took him in last night because it was cold said him but cannot keep him I have an old dog that's not in good health that doesn't like other animals plus I'm on disability and can't afford another dog please help me find this boy's home or if you're willing to foster or know if somebody who's looking for a really sweet animal but I know he must belong to someone I think there's three days to find the owner I will not call animal control because I don't want to have any ACS there's enough animals being euthanized and I know this dog belongs to someone if not he needs to cuz he's really sweet very affectionate and he responds to sit and stay he's a good boy please help me find his home or if you can take him please do and try to find his home for me I cannot keep him