Say I retire out of the Navy with 2000+ hrs and test out to the highest I can get with the FAA, could I take a separate checkride and obtain my ATP Certificate as well?
yes
http://www.gleim.com/aviation/airline_transport/atpreqs.php
Say I retire out of the Navy with 2000+ hrs and test out to the highest I can get with the FAA, could I take a separate checkride and obtain my ATP Certificate as well?
^^^ Actually you could get your MEI first if you wanted or even CFII using a ME aircraft. Nothing says you have to have the SE CFI.
What school are you with? I got my license (and did IFS) with Capitol Air, but last I heard they were having financial problems. From what I've heard, ProFlight is the best place to go and seems to be the most professional.
http://www.learntoflyatbwi.com/