From what I've seen. They hire with low time 550TT is the lowest I've seen.
They have a 15 month training contract. Which is pretty standard. Upgrade time is fairly quick 15 months to a year and a half. Depending on age and merit.
They fly old b1900s with an old stack and no autopilot through some pretty turbulent, icey, mountainous areas. sounds like a pretty exciting flying job- unlike mine flying back and forth from FL to the Bahamas.
The drawl back is pay- $15per hour. Ouch- pretty low expecially for Denver.
I would add up all your current bills and make sure you can afford it.
I also suggest going into the search part of the forum and PM current pilots for further details.
Good Luck.