Except your quotes do not connect Daniel 12 to anything.

If the 3.5 times was not in chapter 12, you would not be able to imply it was connected in the past at all. Only because two different original words have been translated into the same English word, are you able to think there's a connection.

The power is the same. It will be healed in the future. And has been healing now.

Seems to me the plagues are poured out while Jesus is en route to bring the righteous home.

Actually, am 100% certain it will all happen within "a number of days". That is, from the moment probation closes to the instant Jesus appears as a small black cloud in the East "a number of days" will have lapsed.

I would think at the speed that they transverse it will be pretty simultaneously, but we arent given an exact time.

Well, seems to me, they aren't.

Come now Kland.

What Jesus is doing during the plagues is an interesting question. The shekinah glory according to Ellen White frequently filled the temple so that the priests had to withdraw, but these were times of heightened rather than diminished intercession. From what I can gather they most often occurred during the morning and evening sacrifice.

When the plagues fall and no one can enter the temple does it mean that no person can be inside the temple or does it mean that no new persons other than the ones that are already inside can enter? In Ezekiel's temple the blood is applied to the posts like on the night of the Exodus.

Over the centuries many saint during times of persecution and danger have committed Psalm 91 to memory. I’ve memorized some of it but should finish memorizing it. It applies especially to the plagues. See verse 10. Notice the bolded statements telling us where the saints are sheltered during this time:

Psa 91:1 He that dwelleth in the secret place of the most High shall abide under the shadow of the Almighty.
Psa 91:2 I will say of the LORD, He is my refuge and my fortress: my God; in him will I trust.
Psa 91:3 Surely he shall deliver thee from the snare of the fowler, and from the noisome pestilence.
Psa 91:4 He shall cover thee with his feathers, and under his wings shalt thou trust: his truth shall be thy shield and buckler.
Psa 91:5 Thou shalt not be afraid for the terror by night; nor for the arrow that flieth by day;
Psa 91:6 Nor for the pestilence that walketh in darkness; nor for the destruction that wasteth at noonday.
Psa 91:7 A thousand shall fall at thy side, and ten thousand at thy right hand; but it shall not come nigh thee.
Psa 91:8 Only with thine eyes shalt thou behold and see the reward of the wicked.
Psa 91:9 Because thou hast made the LORD, which is my refuge, even the most High, thy habitation;
Psa 91:10 There shall no evil befall thee, neither shall any plague come nigh thy dwelling.
Psa 91:11 For he shall give his angels charge over thee, to keep thee in all thy ways.
Psa 91:12 They shall bear thee up in their hands, lest thou dash thy foot against a stone.
Psa 91:13 Thou shalt tread upon the lion and adder: the young lion and the dragon shalt thou trample under feet.
Psa 91:14 Because he hath set his love upon me, therefore will I deliver him: I will set him on high, because he hath known my name.
Psa 91:15 He shall call upon me, and I will answer him: I will be with him in trouble; I will deliver him, and honour him.
Psa 91:16 With long life will I satisfy him, and shew him my salvation.

I found this in GC page 640 which occurs after the plagues fall, after the death decree, after the wicked are no longer pursuing and instead are overwhelmed with terror and see the 10 commandments in the sky traced in a pen of fire, after the mighty earthquake, after the graves are opened for the special resurrection:

Next paragraph:

Kland, what can we learn from the sequence you listed above about the timing of the "number of days"?

Also, do you know of any inspired passages (Bible or SOP) that portray Jesus hanging out somewhere in heaven until the moment God announces the day and hour of Jesus' arrival?

And, if so, do any of them specify approximately how much time will lapse between the close of probation and the moment God announces the day and hour of Jesus' arrival?

Do you feel the first quote you posted above implies both the Father and the Son remain in heaven until the moment the Father announces the day and hour of Jesus' arrival? If so, do you feel this is the moment the "number of days" begins, the moment Jesus leaves the most holy place and begins His journey to the East (referring to the quote where she mentions "a number of days").