I studied for a month, worked at it with a couple instructors for about 5 hours in the 10 days preceeding the ride. Did two flights. Oral was about an hour and a half, flight was about the same.
There isn't a 3 in 90 requirement for an additional instructor rating.
TD: Be honest. If you are waiting to hear from another, tell them so. It's the right thing to do. I had an interview with a place in Houston where they offered me a job. Really nice guy but I asked for a few days to wait and hear from where I'm currently working because I'm closer to home. If MVP Aero is where you're looking they seemed like a good operation and the owner couldn't have been more friendly in my conversations with him. Had the circumstances been a little different at the time I would have accepted the job offer.