If we wanted to be arbitrary about it, we could pretend that a janitor's time is worth a trillion dollars per hour because said janitor's time is a finite resource that can never be recovered. However that doesn't do much for you when you have to actually decide how to pay a janitor.

It sounds like as a serial entrepreneur you like to decide how to pay janitors, because you can buy a few years of their time for a relatively low cost that you can turn into wealth for yourself.

When a janitor is working, he isn't working for $4 an hour or whatever it is you pay him. He's working for the rent & the food that will keep him alive, so that he will have time to continue to living, and that time is valuable to him. That's what he's getting paid, and that's why he's willing to work for you for $4. Just because it costs you nearly nothing to hire some people for an hour doesn't their time is worth only $4. It's worth a lot more than that. $4 can buy enough calories to last for days, and that time will be spent with his friends, family and his children(? possible if in India), and that's called "intrinsic goods", something money alone can never buy, because money only buys you time to acquire those goods.