I have known rare but wonderful animal shelters (not government run, I imagine, but I'm not 100% sure on that) with a policy against euthanising animals unless medically required. That is, they won't just kill your darlings after a certain specified amount of time. I have no idea where you are, or if there's one near you, but if you google up your area with "no kill" animal shelters you might find one. Because of their policy, though, they can only take a certain number of animals. Still, they'd be a great source for ideas and options.