I am currently doing run 515/707 here out of JQF. The routing for this run is JQF VJI ROA UKF RDU JQF. It is nice run. It leaves at 1400 and comes back at 2100 local time.
If you are willing to move anywhere, you can get a twin run in about 3 or 4 months. I could have gotten a twin run sooner than I did if I had been willing to move to Hanover, VA, but I didn't want to do that. I just didn't want to move there for a few months, and then have to move again once I get an airline job. Beseides that, I happen to like living here in Charlotte. The next time I move, I want it to be for an airline job.
One of the main reasons I chose Ram Air over Flight Express is because the upgrade time to the twin is much faster at Ram Air. At Ram Air, I don't see any reason why it would take longer than 6 months to get an upgrade. And you can it much faster if you are willing to move.