I've never fed my BP live--and he's only had one feeding with me so far (I'm pretty new at this myself), but if the sound of a mouse screaming is your only concern, then feeding frozen/thawed sounds like a really good option for you and your son.

When I bought my BP from the breeder (NERD), they got my BP feeding F/T before I brought him home!

Frozen/Thawed mice are humanely euthanized (usually in a Co2 chamber), then frozen in bags. You bring them home, thaw them thoroughly then warm them up just before feeding time. The mouse is already dead, so no "screaming" involved--and it's something that your 14-year old could easily do by himself. Another benefit to F/T, is if your BP decides not to eat on a given week, you don't end up with a "pet" mouse for a week (or more)!

Transporting him every week isn't a good option for a BP, and I don't think it's necescary to feet the snake outside of his tub/tank.

Just my