I'm not understanding. It sounds like you're saying you intend to fly at a 60 acre private field in the U.S. If the field is private, why would you need AMA membership? Also, who will you be flying with? If alone, you should know that it's not only lonely, but there are inherent dangers even with a .40 sized plane. If with others, could they teach you how to fly?

On the issue of instructors, if you decide to go alone, I would recommend a "durable" plane, like the U.S. Aircore, Airmadillo trainer, or a Spad. If you do get into the cycle of 10 second flight, crash, repair, with one of these planes you may be back in the air in a few minutes. One hard part for you is going to be getting the plane trimmed, not an easy thing when you're learning. I recommend you take a lot of time to get the controls centered using a straight edge. I have found that if the plane is well designed, and well built, if you take the time to get the neutral positions exactly right, the trim should be close enough to give you a fighting chance.

Any one who has taught beginners knows that you spend almost as much time teaching the engine as you do teaching flying. So, to reduce that learning curve, I'd recommend the Evolution engine, since it purports to reduce the learning curve in this area.

Good luck to you!