you are all talking about Opportunity Cost.
While it seems to be a choice between time/money/knowledge/capability, it is much more.
In Rick's case, he can drop off his bike, then go fishing, or to a car show, pet the cat, etc.
Arnold may value a bit of alone time with the bikes - as he finds this relaxing, and chooses it.
Or perhaps it is spent showing a kid how to throw around some tools...then when they learn about torque in kollege, it makes sense in a real world kinda way.
This activity is at home, which is also important.
Since he enjoys it, learning about it, building up knowledge and tools over time, he is not missing out on another activity.
While he might prefer some of his equestrian interests at times, and put off a bike repair - that doesn't mean he is missing out on riding...
Yes, time is the most valuable asset. It can not be banked, or expanded.
Yes, you "buy time" when you you pay someone to do something - again, just opportunity cost where $$ is involved.
The choice of how to fill time is personal.
I will now be replacing the gasket on my washing machine for the third time.
It is going to take me less than 30 minutes, and save a couple hundy.
It is raining out - i guess i'm trading off fake riding for appliance repair
😉
Then i'll go get sushi, cause i've never even tried.