Although people tend to kind of make you feel bad about not taking a bird to the vet, I know what you mean that it's not an option.  I do all i can and if I can't help them, I don't see the point in taking them to the vet, spending $1000, and still having a dead bird at the end.  I worked for several years at a large animal vet, and if Dr. Pat can't tell me what to do with one of my birds, there's nothing to be done, luckily though he doesn't charge me for advice!
Good luck with your enemas, the things we do for our animals, lol.  Might make us rednecks, but I know i'm proud of my inventions! Just from treating other animals with blockages, I would agree that is your best bet to help her out.  Keep us updated!