If you do things right, with good connections and good equipment, the servos could sit on the battery. Not recommended, but it could be done. There's a fair number of us with some time in the hobby that locate throttle and choke servos next to ignitions and ignition batteries all the time. Even running a 72 mHz system, which is what I normally fly with.

Odds are likely that when he gets to doing the weight and balance on the plane he'll have to move something back anyway.