As everybody else has been saying, stay put.

Since I assume you flying P91, you shouldn't have any limits on flying. Use the MEI, Get a CFII ( didn't see if you had one) and get the ATP. See if your employer will help pay for it. It may help lower his insurance. Win, Win.

As a part time instructor (MEI,CFII) and contract pilot with a full time desk job, I average 400-600 hours and supliment my income by 12-15K a yeay.

I would love to leave my day job in manufacturing ( I hate it but it pays good), but if I left it and went to a regional, My salary wouldn't much more than my part time income! Yikes!

Every time I get the full time pilot fever, (I'm 43 ) I picture trying to support my wife and kids on regional pay and realize how much fun I have flying now.

If your day job involves working in the flight department, see if you can convince them to upgrade to turbine. Plenty of cost benifit info out there if theres a need for it.