Thanks to both of you for your responses. I am going to Off the Ark tomorrow (where we get our feeders) and he has fully grown boas there. I might ask to hold one and get a feel for how they are to handle. He has some babies there I might hold as well.
If I were to get a columbian, what size tub would it need as a baby? What size enclosure as an adult?
Any pics of enclosures?