These are great tips @Mark_Phillips
The part about maintenance is key, and it’s also about learning how does a product actually work, and therefore how to best take care of it.
Talking to a trusted professional repairer of the type of product you’re after is very helpful. They will know which brands might be easier/cheaper to repair, and which are reliable. And they’ll be able to share simple, crucial insights to increase durability. For example, when we last interviewed South London’s white good repairer Steve the Spin Doctor, we learned that the main thing for washing machines is to avoid overloading them and to regularly clean the filter, which I’m sure many people didn’t know existed, including myself