Looking into buying 3124KB

My wife and I are starting to do our homework about the TM and we seem to like the whole TM in general and the 3124KB specifically. We've looked at the TM web site and visited a dealer so that we could get familiar with the "hands on" aspects of the trailers (including set up and tear down).
I'm wanting to know if the experts of this forum can help me to learn where and how I should do more homework. Where are the best places to learn more about the TMs (if there are any besides this forum)? What things should I learn before I make a purchase? Things like that.

Thanks and happy trails to all!