I would also suggest ALLATP's. I did my Multi Commercial Instrument add-on with them. I was in and out in 4 days. It costs less than HALF than DCA even with hotel costs! The program that I did got you 8 hours of instruction in the air, 3 on the ground, and the flight test (for me) was 1.7 on the Hobbz. Examiner fees are typically $300 IN CASH. I'm not as familiar with the CFI programs, but I believe you have to go there with 15 hours of ME PIC (one of the MEI requirements). I am sure that you could work out a 15 hour PIC block with them...they seemed to be pretty flexable.
Check out their website and call the hotline for more info. They are very helpful!
D