OMG. This is our situation too. The siblings have moved far away and we'd be the only ones nearby to deal with the issues. Luckily, DH's job would put us about an hour away from all of them. But that's still close enough. They expect a LOT from us and it's exhausting. We would have to go in expecting them to resist our new boundaries but I cannot imagine going back to the old way.
Wow. A lot to consider.