I think jumping into mining at that stage would be a mistake. Robosats or Bisq would be better uses of time. 

As you can understand from my post, yesterday he thought Bitcoin is scum, today he thinks Bitcoin isn't scum however he doesn't know anything about Bitcoin. He is at the beginning of long road of study

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On a strictly economic level mining is all about the cost of energy. Its really a question of math. If I had access to cheap power I'd be mining as much as I could. But I'm not your pal. Hope that helps.

bitcoin

Low cost electricity changes views

To me its all about their goals.

* Do they want to stack as many sats as possible? Don't mine first. Buy or earn bitcoin
* Is privacy a primary goal? Mining may be a great option, but they need to understand bitcoin privacy first in order to do it.
* Is learning the goal? Mining is a great learning experience. You can scoop up S9's for cheap and they are simple to work on. They aren't efficient but they should start with one of these because they are cheap and great for learning.

On a strictly economic level mining is all about the cost of energy. Its really a question of math. If I had access to cheap power I'd be mining as much as I could. But I'm not your pal. Hope that helps.