I completely understand your pain. I had some life changes that resulted in something similar for myself and my two dogs. Unfortunately I work 12 hour shifts. I actually ended up moving to be closer to my job so I only have a 10 minute commute instead of an hour each way, so its not a 14 hour day for the dogs. My rottie mix is well behaved enough that she can have free rein of the house while Im gone, but unfortunately my Min Pin is not quite so well behaved. I feel like a horrible dog-mom having to crate her for 12 hours at a time, but unfortunately its a necessity. I can occasionally have someone come let her out, but its inconsistent at best.
Long story short, I can commiserate!