Was he on F/T at the breeder's facility? Give him at least another week to settle in and try F/T again. If nothing, give him another week or so and try again, but I would wait before offering live. Make sure your feeder is warm enough. You don't want to cook the rodent, but after it thaws a lot of people here have great success heating it up with a blow dryer. Basically hit it with the blow dryer and immediately offer it (they cool down quickly), repeat as necessary. It's extremely likely he just needs to feel secure enough to feed, and remember these snakes can go a surprisingly long time without food, even when young. Hard for us to wrap our heads around sometimes!
At this time you should be totally hands off until he feeds, and try generally to disturb him as little as possible. Your setup sounds fine, but you are right that it is a big change from the breeder's setup, and remember that to a snake your house smells completely different than the world he is familiar with.
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