Hi
You shouldn't get hoarse (if you want to make a distorted sound to sound hoarse,you can do this in a healthy way) nor sore. It means that if anything hurts or doesn't feel right, you can be pretty sure that it isn't right.
By using the right support and the "gears" in the voice, you'll be able to sing as long as you like, always have enough air for each frase, you can get the power you want, you can reach the notes you want ( by making the right exercises in the right way using the right "gears", read more on www.charlottewolfsberg.dk).
Charlotte