two part question/issue

hello! I’m new to the Tesla world (and car owning in general).

part one: i went to the shop to get my cabin air filter replaced this past Friday. prior to my service visit, my air pressure for all four tires were fine. right after my service this weekend, I notice that the psi for one of my wheels would drop 10+ psi overnight. i made Tesla aware of this and they recommended that i put a service request in. my closest center is 30 minutes away, so how do i request them to do a home service and ensure none of this is overcharged?

part two: i was looking over my maintenance list and saw that the wheel alignment was $275. i am going down the list of tire companies outside of Tesla to see if they have cheaper and/or better alternatives. does anyone know of any companies i can add to my list?

thanks!