Personally I think frozen and thawed is a better method if they will take them. If you start them off on live they may be reluctant to ever take f/t, and as the prey size becomes bigger it becomes increasing more difficult to feed live e.g. the prey could cause considerable damage to the snake. And once you sell on or whatever you plan to do, not everyone will have an easy supply of live.
So just a couple thoughts for you to take into consideration...