Thank you for responding! All of this is very helpful.
I will definitely look up some tap training methods. That's a great idea.
I can imagine it takes effort to build a good relationship of trust with a boa and that's very important given their size. I've handled a few BCI babies at cons and yes they are so hissy and bitey! (Can't blame them though. They probably thing everything is a predator.) Perseverance and patience seem to be the key.
Thanks for the recommendations on other boa options. I wrote these down and I'm going to check out some upcoming conventions and see if there are any of those types there that I can see in person before I make a final decision. That's one thing I love about boas in general. There are so many different types.