I enjoy high mileage stories and really appreciate it when an owner makes the effort to keep a car going and take it the distance. Having said that, two things detract from this high mileage story...the head gasket...and the hybrid battery. Those are two big repairs. The hybrid battery from Toyota being $2,500 and I imagine the head gasket repair being somewhere close to that. That's a good $5,000 in out of pocket, unexpected repairs.
I can live with the struts, water pumps, control arms, fluids, EGR cleaning, PCV replacement...but head gaskets, hybrid battery and even an intermediate shaft, shouldn't happen until that thing is reaching 300k or more. IMO.
But good story, love the commitment. Take it to 400k without major issue and get that money back.