I don't fly for AMF but from what I have heard and read: start on the PA-31, upgrade to the B99 in about a year (sometimes less), and as far as schedule, plan to be gone more than you're home; a lot of time spent at the outstation. 5 days a week, weekends off, and you get two random days off per month, your choice.

If you go through this thread as well as the "121 vs Ameriflight" thread you will learn all you want to know.