He would be best adopted out.There are sooo many caring people out there that accually LOOK for cats like this to help give them their last days...full of love and it accually helps the owners through tough times too.It helps both sides feel good.Sometimes people just have that caring heart to help the worst off cats.
Only...I wouldn't put him in a cage to wait.I'd keep him at your place till adopted.I know being in a cage causes deep depression in animals.Cats especially because they have such high intelligence.
This of course is only if you cannot care for him at your place without him being in a cage.
Just an opinion because I know you have a lot on your hands right now.
I understand Gary's opinion too.