Re: Java Bean
Hi and a big welcome from me too!
As the girls have already said, there is no rush to start the treatment, even though you desperately want to see Java bean get better as soon as possible. Sometimes it's better to be sure and have every I dotted and t crossed before starting down the path, as if there is even a remote chance that it may be something else other than cushing's, she could end up worse for the treatment. I too am not trying to scare you, but please be aware the drugs are very specific and do have side effects if used incorrectly.
I also have to caution you against dividing the caps yourself. Trying to measure such a small dose out on scales is incredibly difficult, and you would need to have scientific microgram scales to be anywhere near accurate, then you would have to make sure that you got all of it to Java Bean and none of it on you. There are compounding pharmacies around that can do this for you and package specific doses into caps, it can be considerably cheaper than buying brand name. Perhaps if you give us an indication of your area, someone maybe able to help you out with suggestions of cheaper price? I personally buy 100 10mg caps for $99.00 - in West Australia, but that is an example of a cheaper price for compounded meds. And yes, it does get cheaper eventually - I too am a classic one for not caring what/if I eat as long as my boys are looked after first
My friends don't understand and think I am nuts - but they're my boys.
Anyhow, before going the treatment route, are you absolutely sure of the diagnosis? As others have mentioned above, there are a lot of different issues that mimic similar symptoms. If possible, ask your vet for copies of all of the tests that have been done on Java Bean and post the results here. That way you can get some extra feedback and more supportive help. It's also a good way to keep check on your vet. We need to remember that they are human and do make mistakes on occasion, so we need to just look over their shoulder at times.
Keeping a file of all of the test results is actually a good idea though in case you have an emergency situation and need to visit an ER. Having a complete history to take with you if you have to see a foreign vet will make things easier for everyone involved.
At this point, take a deep breath and try and get hold of those test results first. And while you are waiting, tell us more about Java Bean. Such a cool name has to have a spunky pup to go with 
Naomi, Oscar and Marcie.
RIP my beautiful Fraser - passed October 1 2013. Original diagnosis Cushing's, but taken from us with rapidly aggressive liver cancer.