The Rambam (in Hilchot Mechira 25:5) brings the following halacha
When a person sells a house, he also sells the oven, the range, the
door frames that are attached with mortar, the door, the beam, the
lock, but not the key. [...] Nor does he sell the blocks for the feet of
a bed, nor the window frames, even though they are affixed with
mortar, for ...
It would have made absolutely no difference during the conquest if the Jews would show up ~400 years later to claim that they 'purchased and owned the land', just like it made no difference when Jews began returning en masse ~100 years ago to the Holy Land, and in a smaller scale, made little difference when Jewish survivors in Poland tried reclaiming their ...
The reason you didn't see the cities' sizes being determined is that the cities were existing cities allocated by lottery to the different sons of Levi according to the size of the tribe giving them out and according to the size of the Levites tribes.
In Bamidbar 35:2-8, Hashem tells Moshe that the tribes should take cities from their land and give them out ...
Ma'aser Sheini 5:14 says clearly that converts do not get a portion in the land.
מִכָּאן אָמְרוּ, יִשְׂרָאֵל וּמַמְזֵרִים מִתְוַדִּים, אֲבָל לֹא גֵרִים וְלֹא עֲבָדִים מְשֻׁחְרָרִים, שֶׁאֵין לָהֶם חֵלֶק בָּאָרֶץ.
From here they said, Jews and Mamzers admit, but not converts, nor freed slaves, for they do not have a portion in the land.
(Admission in ...
RaDa”Q (R’ Dawidh Qimhi), commenting on Yehezqel 47:23, writes (my translation):
והיה בשבט אשר גר הגר אתו - כי לעתיד בצאת ישראל מהגלות יודעו השבטים, אף על פי שהם מעורבים עתה ולא ידעו איש את שבטו, יבוא אליהו וייחס כל איש אל שבטו
And, so it will be, in the tribe in which a convert lives with him - Because, in the future, when [the Nation of] Israel ...
If you were told by Ribbono Shel Olam that your descendents starting with your grandchildren would be slaves in a land not their own for 400 years and would emerge with great wealth and recieve the entire Land of Israel as an inheritence, and conducting
real estate transactions with the locals was like pulling teeth, would you bother to purchase a single ...
Yehoshua chapters 13 - 19 gives a detailed description of the borders and cities of each tribe’s portion in the land, as was allocated to them by Moshe (in Transjordan) or by the lottery conducted by Yehoshua and Elazar (in Eretz Yisrael proper).
R Shlomo Riskin (the Chief Rabbi of Efrat in Israel) writes indeed that a ger toshav can own land in Eretz Israel
According to Rambam [Avodat Kochavim 10:6], the very term ger toshav, stranger-resident,
defines the fact that any gentile who accepts the seven Noahide laws
of morality may be a resident in the land of Israel, may purchase or
rent land ...
In Yehoshua (perek 12), there are listed all the kings that Yehoshua and benei yisrael conquered after entering C’naan. It ends by saying:
מֶ֥לֶךְ תִּרְצָ֖ה אֶחָ֑ד כָּל־מְלָכִ֖ים שְׁלֹשִׁ֥ים וְאֶחָֽד׃
The king of Tirzah, one; all the kings, thirty one
And although there was still land to be captured: (13:2)
זֹ֥את הָאָ֖רֶץ הַנִּשְׁאָ֑רֶת כָּל־...