Re: gas stations for tire pressure - it's the worst! They'll charge an exorbitant rate, the timer cuts out before you get to your fourth tire, someone is parked in the way or the machine is down - filling the tires was literally my least favorite part of car ownership for years, and I tend to do most of my own simple maintenance like oil changes.
I bought this tool on the battery platform of the rest of my power tools: https://www.makitatools.com/products/details/DMP180ZX
Best $120 I've ever spent! Can't recommend enough. Also great for inflatable mattresses, kiddie pools, basketballs, and shuts off automatically when it gets to the pressure you set.