I went through a certification course the GAR (Georgia Association of Realtors) held. I have also paid the money and gone to several other programs - 8 in all. All of which supposedly have designations with them. CSSS, CREO, CREOS, DPS, CSP, I am just not someone that uses all of my designations... I mean I would probably end up covering the whole back of the card with letters. I am what I jokingly call an education junkie. I definetly believe in going and getting the training. I just dont need the letters... and the NAR officially does not acknowledge any Certification at this time.
I suggest you get the training and don't worry about the training. I also suggest you go to some on a local level first. They are normally cheaper and have a lot of the information needed. After that if you want to continue I would look into the ones that are costing more money. I just don't want you wasting your money if you are not actually going to use it.
I am closing on average 3-4 a month. I went there for a while where I was doing a lot more than that but realized that I actually wanted to have a life outside of real estate. I carry between 10-15 short sales at a time in various stages which I may cut back to even less. They do take a lot of time. They can and do get closed. You just have to have extreme persisitence and a terrific package that you give to the bank.
I actually teach a short sale class locally... mine is a free class. I show people how to put together a great package and then do alot of Q&A. I can say every short sale is different.
Good Luck! I think they are doable - just be committed.