Just wanna say I do a few things like this, too. Examples being duplicate toiletries and clothing I keep permanently packed so I don't need to actually pack when traveling. I have duplicates of the same vacuum cleaner and broom/dustpan combos on every floor of my house so I don't need to go down or up stairs to get one. If I was wealthy enough to have a vacation home, I could see owning a duplicate car to keep there, assuming I was a more typical person who drove more.