Tough call
Go to airlinepilotcentral.com and look at the compensation tables for UPS and FDX. With present growth at FDX (not sure about UPS) you might make wide body captain 8-10 year time frame, but be very junior. Take 130JDrvr advice cut your standard of living to 1st-2nd yr pay. Plus your corporate job might get better, hence more pay? You must have buds at FDX or UPS. Ask them how they like the cargo life style.
Cheers