Nothing ac related is cheap. Do it once do it right, and it’ll last many many years.

https://www.championautoparts.com/Technical/Tech-Tips/Spark-Plug-Torque-Recommendations.html

Have had lugs not come off with a m18 high torque before tbf…

Am I seeing shit or is the bottom broken inwards? Some oil in your charge air pipe is normal and expected with CCV venting into it. Excessive oil indicates turbo bearing or seal failure…but if that is broken, spraying oil all over, you’re feeding unfiltered air into your engine and losing boost, so surely it’s not or you’d be getting a CEL…?

You’re fine.

Get a jump starter. Good to have one in your car anyways in case of emergencies