Currently two classes going through right now. Mix of military heavies, previous cargo, corporate fractional, and regional.
Seems like hour counts vary, but I don't know of anyone yet who only has the mins. Most are multiple thousands of hours TT. High PIC hour counts in there.
Advice would be to apply, keep applying, keep going to the job fairs, keep gaining hours, and don't stop. So many factors go into a person getting hired. The stars need to align properly with the needs of the company, who you are competing with, how well the company is doing, and so on. Not being hired in the first round you applied to doesn't mean the next time will be the same answer, or the next time. Be persistent and keep flying! BTW, Houston is a VERY senior base for Atlas. You won't be able to hold it as a new guy.