Unless you have someone to help, then you will no longer have vacations , as you have to be there to feed every day. I don't depend on auto water , due to the fact that pipes freeze and break , and I like to see how much water my horses consume.
I don't go on many trips, but occasionally, I do leave town from time to time, and having a network of people who can feed for me because they're there to feed their own horses has been a lifesaver.
And I used to have auto waterers. The pony kept playing in it, so I switched to buckets instead that I fill up once (sometimes twice as I always like to keep them topped off) a day. If it hadn't been for that, I wouldn't have noticed my faucet connection had broken. It took 3 days to get it fixed and I had to haul water twice daily, but at least I was on top of the situation from day 1.
And if you only go once a day, that's taking a heck of a risk. So much can happen in 24 hours. Heck, I've had stuff happen 3-4 hours after I've left the barn (and right before I'm ready to go back for the second time) and get a phone call from a friend from full care who just happened to ride down to the self care area...
I guess I consider myself pretty blessed. My horses have more space than full care (currently expanding to make it even bigger, yay! ) my own shed for hay and tack so stuff stays where it is, and a network of people I can fall back on if push comes to shove. I'd never want to be the only person at a private place. But that's just me, I guess.