Good god you suck at shopping. You can get the OEM ZR5TPP33 Bosch plugs for $9/ea from Amazon. Those are normal prices for turbo charge pipes. I'm still going with your driving is a factor in yours failing. The only one I'll give you is the water pump but both JLee and I specifically told you it was a $500 water pump before you bought your car. But in general, welcome to owning a luxury car.
It's amazing how you did "extensive" research on this car yet seem to be surprised by information that literally everybody knows.
I gave you a link before your bought yours of a $30 Torx socket set that covers every maintenance/repair item you've mentioned so far save for spark plugs themselves and needing a spark plug socket is pretty normal. So again, if you spent $300 on tools, you just fail at shopping. Basically you were told all of this info before you even bought your car. Do you actually retain any info you are provided or does it just float out the other side?
Seriously, sell it and go back to an old Civic. You clearly aren't qualified to own a nice car.