You're welcome, Greg. It's not that they absolutely can't live together it's just not generally recommended especially with newer keepers who might not have the experience to see trouble until it's a bit late. Also I've just never seen the upside to it when there are so many potential downsides.

With a 55 which is quite large, you might want to consider splitting the tank with plexiglass or something snake safe (I've personally never done it but have seen threads about it). That way once your new BP has finished quarantine in another room, you could have them live side by side. Sort of the same effect you were going for but without all the possible risks.