I have my C's. After I graduated (there were only Masters degrees then) I did my CFY and wrote the national exam near the end of my CFY.I think back then I neded them to practice in the state I was living, but to tell you the truth I can't remember. Recently finished my transitional AuD (Aud mostly online for those with current masters degrees and several years experience).
Never thought of a military career. Was born in the UK and came to North America as a child-have lived in Canada and U.S. Military audiology may be interesting as you will be seeing a youger demograhic (working with seniors is rewarding, but can get very draining).
In manufacturing salaries vary widely. In house technical support audiologists probably make the least. Regional trainers and auds giving seminars make more. Sales reps (a lot of manufacturers prefer audiologists) probably make the most. I worked for a manufacturer about 10 years ago so it was a different time. Most aids were analog or just programmable and the tech support was pretty easy (which cord to use , how to turn on the computer for some hearing instrument specialists). I have friends from school who work for manufacturers and do very well but they have a lot of travel and are great public speakers (regional trainers).
When I worked in house 75% of my day was technical support over the phone, 25% was production/audiology related (answering production questions about customer requests, helping customer service with training, testing new products, seeing patients in house that had fit problems) A couple of times a month I would go out with a non-audiologist rep to train customers on software. Twice a year I would give presentations at regional seminars (10-35 people). Of all the audiology jobs I have had it was the most interesting and varied. The negatives for me were that I hated giving seminars, got bored answering the same questions over the phone every day and was annoyed at the incompetence of many of the HIS that I had to deal with and entertain at conferences etc. (but all jobs have negatives).
In terms of salaries an educated guess today would be in house (55-75K) trainer (70-90K+) slaes rep (70K to unlimited). Ten years ago I made about 65K but was offered 50K, but negotiated the 65K).