Sorry man, but you are missing a whole lot... of Bible truth, because the "mansions" in John 14 which Jesus promised to gather His saints to, will... be on earth, as it is the Millennial Sanctuary called God's House per the Ezekiel 40 through 47 chapters.
The Greek word for "mansions" in John 14 means 'abodes', 'chambers'. And those are defined in the Ezekiel layout of the future Sanctuary, on earth.
Revelation 20:9 also reveals where the saints are at the end of the "thousand years"...
Rev 20:7-9
7 And when the thousand years are expired, Satan shall be loosed out of his prison,
8 And shall go out to deceive the nations which are in the four quarters of the earth, Gog and Magog, to gather them together to battle: the number of whom is as the sand of the sea.
9 And they went up on the breadth of the earth, and compassed the camp of the saints about, and the beloved city: and fire came down from God out of heaven, and devoured them.
KJV
The "beloved city" and "camp of the saints" will be ON EARTH, not up in Heaven away from the earth. Even in Zechariah 14 we are shown Christ's future return with His saints to the Mount of Olives on earth.
Be aware I know that temple and the wheels and the prophecies related of it, and the brass man that builds it, and them that has come to pass and will come to pass in the book of Ezekiel.
By your words 1000 years, Jesus has about 7 years before earth is destroyed its not going to happen with end days earth will be pulled out to and different orbit and will never recover.
Isaiah 24
1 Behold, the Lord maketh the earth empty, and maketh it waste, and turneth it upside down, and scattereth abroad the inhabitants thereof.
2 And it shall be, as with the people, so with the priest; as with the servant, so with his master; as with the maid, so with her mistress; as with the buyer, so with the seller; as with the lender, so with the borrower; as with the taker of usury, so with the giver of usury to him.
3 The land shall be utterly emptied, and utterly spoiled: for the Lord hath spoken this word.
4 The earth mourneth and fadeth away, the world languisheth and fadeth away, the haughty people of the earth do languish.
5 The earth also is defiled under the inhabitants thereof; because they have transgressed the laws, changed the ordinance, broken the everlasting covenant.
6 Therefore hath the curse devoured the earth, and they that dwell therein are desolate: therefore the inhabitants of the earth are burned, and few men left.
7 The new wine mourneth, the vine languisheth, all the merryhearted do sigh.
8 The mirth of tabrets ceaseth, the noise of them that rejoice endeth, the joy of the harp ceaseth.
9 They shall not drink wine with a song; strong drink shall be bitter to them that drink it.
10 The city of confusion is broken down: every house is shut up, that no man may come in.
11 There is a crying for wine in the streets; all joy is darkened, the mirth of the land is gone.
12 In the city is left desolation, and the gate is smitten with destruction.
13 When thus it shall be in the midst of the land among the people, there shall be as the shaking of an olive tree, and as the gleaning grapes when the vintage is done.
14 They shall lift up their voice, they shall sing for the majesty of the Lord, they shall cry aloud from the sea.
15 Wherefore glorify ye the Lord in the fires, even the name of the Lord God of Israel in the isles of the sea.
16 From the uttermost part of the earth have we heard songs, even glory to the righteous. But I said, My leanness, my leanness, woe unto me! the treacherous dealers have dealt treacherously; yea, the treacherous dealers have dealt very treacherously.
17 Fear, and the pit, and the snare, are upon thee, O inhabitant of the earth.
18 And it shall come to pass, that he who fleeth from the noise of the fear shall fall into the pit; and he that cometh up out of the midst of the pit shall be taken in the snare: for the windows from on high are open, and the foundations of the earth do shake.
19 The earth is utterly broken down, the earth is clean dissolved, the earth is moved exceedingly.
20 The earth shall reel to and fro like a drunkard, and shall be removed like a cottage; and the transgression thereof shall be heavy upon it; and it shall fall, and not rise again.
21 And it shall come to pass in that day, that the Lord shall punish the host of the high ones that are on high, and the kings of the earth upon the earth.
22 And they shall be gathered together, as prisoners are gathered in the pit, and shall be shut up in the prison, and after many days shall they be visited.
23 Then the moon shall be confounded, and the sun ashamed, when the Lord of hosts shall reign in mount Zion, and in Jerusalem, and before his ancients gloriously.