Well, I'm late to the party, but I can give some info about Cape Air. Cape Air is hiring FOs. You do have to have the ATP written done already. FOs can grab as much overtime as they want (within the duty/flight time limitations). I have a friend who started last December as an FO and upgraded to PIC* then to Captain over the course of the year. He's going to make somewhere around $35K. As a year round Captain, picking up some overtime on first year pay, we have people making anywhere from $40-60K depending on how much overtime they grabbed.
If you have other specific questions, feel free to ask or PM.
*Cape Air considers a 135 qualified pilot who doesn't yet have an ATP as a PIC. They can do repo flights, cargo flights, etc. They have a pay grade in between FO and Capt.