I would donate as well, but please don't feel guilty if you are not up to it. There's a reason a very large percentage of rescuers either get burned out or end up being animal hoarders. Even apart from the money, it's a lot of work and a lot of emotional labor. There's a very difficult line you have to draw so you can help where you truly feel able and accept that not all suffering animals can be your responsibility. You've done amazing things for Dave. Getting animal control involved for the others may be the best route. Even that is a sacrifice you will be making to fix something that is not your fault. The most difficult thing is always accepting that we can't help every animal and choosing what is within our limits.
