I'm not familiar w/ american code, but in Canada smokies aren't permissible on a dedicated cct. Sounds like the house is so small you can get away w/ max. 3 smokes. Generally the infeed should come off a lighting cct. (or a cct w/ common lights on it) and the other smokes interconnected w/ a 3-wire. Point being, if you have a smokie that's nuisance tripping you can't just kill the cct. and have no f.a. protection. If buddy's coming to do the service change anyway, pay him a bit more to coach you along.