Blue Beauties are understandably appealing. For what it's worth, I try to convince people who want Blue Beauties to spend time around other large colubrids before committing to one. They are without a doubt an absolutely stunning snake but they are not the right snake for everyone, and not everyone is charmed by an 8' long, nervous, fast moving snake that eats a lot, poops a lot, isn't interested in engaging with people and isn't afraid to bite to let you know that you need to back off. It seems like you are pretty convinced about getting one, so I guess the only other thing I would say is to be sure you have the resources and space for an enclosure.
I personally wouldn't keep an adult Blue Beauty in anything smaller than a 4'x3'x6' at the very minimum, but bigger (6'x3'x8') would be better, which would easily run more than double or triple your one thousand dollar estimate unless you are super good at DIY.