I'm in total agreement with Clementine.
This board has a feel like no other and I'd hate to see it go. I'd rather that the board continue, but, being a one-man operation, having to "beg" for contributions and maintaining interaction with your family would tax anyone's patience. I think we all understand if you want to just walk away.
Anyhow, you can count on me for a donation of $25+ per year, at least.
Have you considered selling advertising space? A couple of banners would be minimally obtrusive, and bring in a bit of bread.