The problem is you need 2000 hours aeronautical experience and 500 hours multi engine command for a regional captains seat in a low capacity operation.
The high capacity operators want 500 multi command or copilot time in a multi crew aeroplane. You won't get 500 multi crew without 500 command in most cases. Catch 22. It's getting harder and harder to get multi piston command too these days, as contractual minimas increase or >5700 ops are required.
GAs T&Cs are increasing as a result, while cadetships are eroding airline conditions the way of Europe to keep up the supply. Maybe one day you'll fly in an airline to get experience to fly in GA and earn the big bucks :P
Single engine turbine time is great once you have 500 piston multi command