Building vs not building. It boils down to personal preference.
Absolutely correct.
What folks don't take into account is the economic value of leisure time, which can be roughly estimated as one-half of the wage rate earned by the individual. And since any part of an hour means that the entire hour is committed to gainful work, leisure activity or prep/travel/other sunk costs associated with either work or leisure, it doesn't matter if the individual can complete the activity in five minutes or 45.
If you earn $25.00/hr working, then a 5-minute build has $12.50 in opportunity cost.
But there's satisfaction derived by successfully building that coil. Ask any coil builder--solving a vexing problem or building on a really difficult deck is immensely pleasurable. That satisfaction (which economists call utility) has an economic value which offsets some of the economic cost of obtaining it. Otherwise, the individual wouldn't be doing it. The same thing happens with DIY liquids--Who doesn't love nailing a recipe for a killer RY4?
Utility values defy quantification. It's why the argument of buying vs building never ends. Entire doctoral theses have been written to describe ways of measuring the value of a recreational activity like... tying the perfect popping bug... or coil building... or, juice mixing. Look at the mech vs regulated debate. Same thing.
All of this is just an economist saying that for some people, time is worth more than money and for others, money is worth more than time.