Serious consideration...

I'm in the same situation! I'm new to the hobby. Started with BP's and now have added Colubrids. I know none of my snakes will get too big. But, I love the look of the Albino RTB. I'm thinking about getting a female just as a pet. But, I know if I do I'll end up getting a male to breed with her. Also, now that I'm about to be retire from the Army. I know the house I'm getting will have room for many animals. Plus, I just got another rack system. So, I have all my babies in like the area of 2 dressers. But, I want a NICE visual cage if I get a Albino RTB......

I hope to have a litter of albinos and sunglows soon.
The prego female is my biggest boa. She's just under 6 feet.
Size was what held me back also. I did plenty of reading, etc. Then got started.
I think boas, BCI and BCC, make excellent pet snakes. If you get a central american BCI, I don't think you will have a size problem.
Do the home work and I think that you would love to have a boa as a pet.