Truck stalled and will not restart

My name's Dana and I'm about to loose my mind. Coming home from Christmas lights Tuesday, my truck stalled and wouldn't restart. Had it towed home thinking I better replace some things the OBD has been telling me to. Replaced camshaft sensor. It started and ran about ten seconds then died and wouldn't restart. Had it towed to my shop (I'm a lube tech) thinking I better replace plugs due to a cylinder three misfire code. Replaced all six because they were all fouled out pretty bad. Started and ran about five seconds then shut off again. Checked fuel rail. Good spray. So at that point I'm thinking its an air flow issue. I cleaned out a lot of mustard colored goo from the plastic resonator connected to the MAF system. Cleaned the MAF sensor with MAF cleaner. Started and ran about five seconds then shut off. Cleaned the intake. Cleaned the throttle. Tried starting fluid. Same thing keeps happening. Now I'm $300.00 in and at a loss. It is Saturday, Christmas is Monday, now I'm out of money and no clue what to try next. Don't let the high miles fool you though. She is leak and rust free. 205,000 of those miles were from one owner. It was the family road trip cruiser. Please help