Just the fact the snake is eating is the most important thing to take into account. If he takes F/T for you just consider it a little convenient "bonus". My snake was eating FT when I brought him home at 6 months so I never fed live. However if all he would eat was live I would be just as happy and content with that. The last time I weighed him he was around 1200g and that was a couple weeks ago. He is coming up on a year and is eating one 70-80g rat a week however many of the veterans here feed their BP's 2 adult mice a week for their entire lives. You will find what works best for you and your snake as you both get settled in to this new experience. You sound like your off to a great start. This place is a wealth of information and great people which for me made the whole experience of getting started that much more enjoyable.

Be sure to snap some pics of your snake when he/she gets settled in.