Thanks for the thought Buff...
To move up to the server at the next level of RAM, we need $1500. That's a steep bill, which is why we haven't made the switch yet. The ultimate goal is to move to our own server at a local co-lo, but I'm not yet ready to trust the server. I've got a friend taking a look at it, and the hope is that we'll be able to make the switch in due time.
In the meantime, to stick with the server we're on, it costs me $894 every 6 months. Typically, between the donations and the money I get through Google ads, we're able to cover this nut. Sometimes there's a little left over, sometimes I'm reacing in my pocket to cover the gap.
I definitely apprecaite all the support I've gotten over the years.