My Focus has it's plugs right on the top, down through the head. It's literally 20 minutes in and out. Ford sent me a special offer for $250 to change the plugs.
It's so easy and cheap I do it once a year in the middle of summer.
Once a year? Plugs last for a decade these days. How much do you drive? Are you driving as you reply?
It's cheap maintenance. I don't care how long they last, I can do it, it doesn't cost much.
Your name is now Handybird. There are vehicles these days that you have to damn near pull the motor to get the back plugs, it's ridiculous. I used to do all my own maintenance but I bought a 2018 Lariat ecoboost. It's only got 46k km on it and I've opened the hood twice 🤣
The back three cylinders are a little tricky to get to on the Impala, but it still only takes about an hour tops. See my response to SoSickOfBlacks.
250 is nuts for any easy setup like that.