Welcome to the forum! I just entered the hobby this time last year and now I'm up to 7 snakes, so I totally understand the fear that you'll add a lot more. It's very tempting to buy what you like and there are so many pics of snakes for sale online that I like.

My advice to you would be to hold back for at least a couple months and make sure that your husbandry is good with your current BP and that you continue to enjoy him/her. Then, when you're ready, I'd look up good breeders in your area and /or check out a local reptile show. In any case, getting a BP from a breeder is a better experience than getting one at a local pet store and you'll be glad you went that route (you often get a much better snake at a much better price).

If you are planning on breeding, check out this article. It has wonderful advice for anyone considering breeding to profit or just break even.

Also take note of the fauna BOI. It is a forum that allows you to read feedback and do searches on sellers you see online or at shows before you buy.

Please do a lot of reading on the quarantine process and how to treat common problems (like mites) before you bring another snake home. I always quarantine in a different part of the house for at least 2-3 months and I also always pre-treat for mites, just in case.

You may also want to look into other species too, you never know what you'll end up liking and you may find something that you enjoy even more than BPs... A reptile show is a good place to do this due to the variety. I started with sand boas and hognose, then jumped into boas and finally BPs. I enjoy the boas most of all due to their personality, but they do get larger than BPs, so caging and safety (and buying the right subspecies / local) is a must.

Good luck with your new-found or at least re-incarnated hobby. The folks here on the site have always been very helpful to me and I'm sure you'll get a warm welcome.