You might want to throw up a PayPal 'donate' button.
A few bucks here and there can make a difference.
I know bikeforums had a way for folks to pay, and the ads disappeared - so you could always fill the space with ads to annoy everyone... then get them to pony up.
![Wink](http://www.bikepacking.net/forum/Smileys/Lots_O_Smileys/wink.gif)
Have you thought about getting some 'sponsors'?