I keep large boids. My advice on that would be to never handle any boa over 6 feet by yourself. Rule of thumb is 1 person per 5-6 feet.
Now, on another note, I can handle my 8 foot female bci with no problems (and I'm a teeny thing). It all comes down to really knowing the animal. There is a 6 foot male bci here I would not handle alone, nor would I handle the 6.5 foot male Moluccan python by myself.
If you really want to get a bci, I would suggest a male Colombian or either sex of a Hogg Island since they do not get as big as mainland bci.