I think he'll stop after SC - but if he happens to actually win, he could get cocky - and excited.
Why are you so bound and determined to turn this into a serious presidential bid that merits critical analysis?
"hurrrr he is inexperienced and that makes him a bad politician hurrr he should go run for a governor and then run for president"
Sheesh. He's running for kicks because he thought it would be funny for someone to run for both nominations at the same time. That's it. South Carolina happens to be the state he was raised in, so it made an obvious choice. He's a comedian with a TV show and this will probably help ratings.