2012 Prius V, 115k miles - check engine light, Head Gasket Repair… what to do?

I’m the third owner of 2012 Prius V that I really, really love for my life in Los Angeles. I got it about a year and a half ago from my parents at 80k miles… out about 30-40k in that year and a half, sitting at 115k now. Recently, the check engine light appeared out of nowhere. Took it to mechanic and was told head gasket needed replacement, that this was common in engines from 2010-2012. In addition to that head gasket, mechanics seem pretty convinced that there’s additional damage to the piston rods, and I was quoted $6300 for all repairs.

what do I do? should I take it to a dealership to see what they quote? do I swallow the huge bill and squeeze as much life out of it as I can? Do I cut my losses and sell / trade in the car?

 

would consider it totaled if it wasn’t for the fact that used cars are so expensive right now. mostly worried that if I spend the money, it’s the beginning of the end and the car becomes a depressing money pit