‘To say that we should plan minimally so that we leave room for the Holy Spirit to move, is to incorrectly demonize planning.’
I totally agree.

However, I’m beginning to think that True Preparation for ministry is that which Jesus modeled. At least 3 hours in the morning hearing what the father has to say, hearing the thoughts of the Holy Spirit and his desires for that day, your place in His plans, what to pray for etc..

I suppose it’s just the conclusion of your post I disagree with: ‘Guess what, it happened as a climax to their planning;’

I believe God himself explains to Solomon a few chapters later:

“I have heard your prayer and have chosen this place for Myself as a house of sacrifice”…
“If my people, which are called by my name, shall humble themselves, and pray, and seek my face, and turn from their wicked ways; then will I hear from heaven, and will forgive their sin, and will heal their land.
Now my eyes will be open and my ears attentive to the prayers offered in this place.
For now I have chosen and sanctified this house, that My name may be there forever; and My eyes and My heart will be there perpetually.”

No amount of planning will build His house.