The scale is a bit different, but pets, like children, come with some moral baggage. They are dependent on us. Washington state is starting to have some trouble with horses in this situation - and you can run up against the financial pressure a lot faster with a horse. It is something to think about when you get a pet. A few years ago my brother got our parents a golden lab retreiver (they all do a lot of duck hunting) Mom and Dad are getting up in years, so my brother made it clear that if or when the time came, the dog could live with him (he's on a big place in Montana). I don't think my parents would have accepted the gift without that provision.
If you do nee it, there are good adoption agencies out there that will handle it for free or low charge.