I run a small Gerbil Rescue from my own home and have done so for 3 years now. I think something which makes me wonder about motives etc is mentioning money in your first post about yourself, when really if you aren't "heard" of you should be concentrating more on explaining a bit about yourself and what you plan to achieve etc rather than mentioning rehoming fees as a first point.
Others may not agree with me but doing a sort of "Rodent's Wanted" post doesn't really make me feel comfortable. Perhaps a different wording just to let people know you exist is best. Also you may be bombarded with members of the public giving you all sorts of animals that perhaps you don't know as much as you could about. For example if someone was to come to you with a Gerbil would you know all the best ways to care for that animal?

I know personally the last thing on my mind is donations. I go well out of my way to do homechecks, accommodation checks etc and offer a lot of help and advice first hand before anything else.

I've spent the three years i've been doing this building up a good reputation (I hope!) and in order to get recommendations from other charities etc I believe the proof is in the pudding and word of mouth is the best sort of "publicity".

I hope this helps a bit, as not trying to put you down or anything, just trying to help.