Gotcha. As far as being on your own goes, I told myself for a long time that I would have been better off being alone. Trying to quit while dealing with the stresses of a family was difficult. I eventually realized that there wasn't ever going to be an ideal situation where I could quit. If any of the other things were going to get fixed in life it all started by quitting regardless of my situation.
As far as availability goes, I have to believe there are ways to limit that. If it is coming from subordinates you can obviously influence that directly. Supervisors may be a different story, but it would be tough to imagine them forcing it on you if you told them you were quitting.