i have found that decks, brick, & vinyl are plenty enough to keep me busy. when you get into kitchens and vent hoods like a friend of mine did, he found there is alot of hoops to jump through which made it not really worth the time he spent, when decks and concrete where much more profitable...
The guys who just do hoods will "beg the difer"
There is tons of money to be made in the hood area .............. You are doing the right thing by getting the proper training..... I would waite untill you hear from our professional hood guys they can steer you in the right direction.
I would pick one skill and focus on that. The problem is this, hoods are serviced at night and "other work" is done during the day. Over time this will create a problem. Being up all night once a week will tend to hurt your overall operation. [hello]