This really cannot be answered generically. It TOTALLY varies by airline, base, equipment, and relative seniority. I'd ask in specific regional forums about specific bases... tell them what you're looking for and they can tell you how long to get it (if at all).
I have seen schedules of 3x commutable 4-day trips, with 18-19 days off, for about 75 hours. But that was a long time ago, before 117. Most regionals are not going to be that efficient today.
The worst schedules I'm aware of are long-day low-credit locals, so you typically work five days on, 2-3 off. Up to 10-12 hours duty, so 12-14 hours door-to-door if you live in base.