So I have a great volunteer gig right now - finding other people to fill long term volunteer positions and then once all the jobs are filled, I am done. Simple mission with a known end date - sweet!
I tracked down one of my candidates and as soon as I started talking, she gave me a look that went straight to my heart. Because I recognize it. It's the look you give when you feel like you are already 105% tasked, but with grit, luck and prayers you are making it work. But you have no extra. Not even for a very part time, very noble volunteer job. To her enormous credit, she said she would think about it, when I know every fiber in her being wanted to run away :-)
Hang in there sister. I've been there, we all have. You will survive!