Purely theoretical ATM as DDogs are still hale and hearty!
When the time comes, due to commitments etc, as well as several previous successful experiences we would be interested in rehoming a "golden oldie". DH and I are both experienced dog owners, adult child currently at uni, lots of experience with behaviour issues etc. Only sticking point would be ChampagneCat, but this would be a consideration with any dog.
We're obviously aware the DDog will have a limited life span and are prepared to deal with this aspect. However we don't have unlimited funds, which is why DDogs are still insured (despite the great cost) I'm guessing that we would find it hard (if not impossible) to insure an older dog.
Assuming bills are not covered by the rescue, do you make a decision early on about how much you will spend? It seems the stuff of nightmares to have to tell the vet you can't afford treatment for your pet, particularly if this will result in them being PTS. TBH this is making me question whether I would take on a dog of an age where we couldn't get insurance cover (so nothing older than around 8yo) My previous oldies come from a time when I had far fewer responsibilities and vets bills were dramatically cheaper!