Electronics Lifespan see below:
SO You think these highly electrical trains will last 25 years. . . you're dreaming.
Small appliances
Mobile phones, MP3-players, irons, kettles, hair dryers etc. 2 – 3 years
Medium Size Appliances
Cleaners, refrigerators and freezers, spin and tumble dryers, microwave ovens 3 – 6 years
Larger Appliances
Electric Cookers, 5 – 10 years
Fridge/Freezer, 3-6 years
Dishwashers, washing machines, 3 – 6 years
Low priced portable CTVs 2 – 5 years
Higher priced non-portable CTVs 4 – 8 years
Low priced DVD player/recorder 2 – 5 years
Higher priced DVD player/recorder 5 – 8 years
IT Hardware
Desktops 3-4 years
Laptops 2-3 years
Tablets 2-3 years
Oh my, just my opinion but your estimates seem way off in my life expireance..
Maybe I'm not up with the times but most of the items you have listed I've already tripled and still going.