An AEGD is more expensive than ten licensing exams? How so? I have heard from many general dentists that an AEGD really took their skills and confidence to the next level, which meant that they could keep more procedures in-house and produce more in the long run. Considering the going starting salary right out of school at ~100K and the fact that AEGDs pay about 50K, the "cost" of doing an AEGD as opposed to year 1 in general practice is 50K. In that year of AEGD, you can become comfortable with molar endo, implants, OS, etc. (depending on the program), which will increase your production in every year that you practice.
ALSO, if you plan to do an AEGD in the military (which is something that I am looking at), I really doubt that the year of experience and training would cost me "WAY more" than a licensing exam- military AEGDs pay you your full income (total starting compensation package is worth 91K + tax/vacation/etc. benefits).