HELP this van has a major issue need advice

I was driving to work when it stalled out I pulled over and restarted it and it was fine

but then the next day during my drive to work it made a loud gunshot noise then it shut off i looked under the van and it blew out the bottom of the motor of the van and i dont know what to do the van will need a new motor but the mechanic it was towed to cant even tell me why it did that the van was never flooded and was always taken care off regular oil changes (every 4,000 ) miles is it even worth getting fixed the mechanic i spoke to says it will be a $10,000 repair for a van with 375,479 miles on it

Junk it, not worth that kind of money. Lucky it went that far, engine just flat blew up, probably threw a rod bearing.