From my observations, prior satellite TV installation experience can be just as much a hindrance as it can a help. I've encountered too many old school installers who've blatantly ignore what they were taught in HughesNet/WildBlue/Starband certification training instructions because "well, that's just not the way it's done". This group doesn't seem to be able to come to terms with what difference a transmitter makes to the configuration.
That's not to say one can't be both a good ROTV installer and a good satellite internet installer. It's just that I've encountered a discouraging number of ROTV guys that can't (or won't) adapt. That said, I don't personally see anything wrong with going into two-way training without prior ROTV experience.
//greg//