Some context to this plan:

This idea was presented to President Bukele during a Twitter Spaces[1] session where he discussed the bill with the Bitcoin community whilst it was going through voting. Mining Bitcoin was not something he has previously considered and openly ideated on the call with the community. It seems like a fully proposed plan for how Bitcoin mining will play a part in the country's overall energy policy has likely not yet been fully formed.

[1]: https://www.youtube.com/watch?v=IRnygiyuG0k&t=4s