So let us turn our attention to this part now.
Language is important.
But for you, it's clearly only about convenience and hot buzzwords.
From the Additional Plots and Housing Guide first:
This is a conditional statement notifying players what qualifies them to make their first purchase. Notice it does not say or follow up with "You cannot" or "You should not" or "You must not".
This is a follow up statement to the above conditional informing players who exceed this amount before or after 4.2 that no consequences exist. Including "housing above this limit" acknowledes players own more than one. Otherwise a specific quantity of "one" would have been designated in the language. As such, there is clearly no plan to enforce on the quantity.
Lastly and most importantly, these are not noted, referenced to, or connected to the Terms of Service in any way throughout the entire guide.
Now back to language importance. Let's take this section from the Terms of Service you personally seem to love:
This is a statement from the Terms of Service. Notice how it specifically states "You may not" and clearly sets a definition for what is considered a violation. Now, let's also note the important blob of text that precedes it, because again language is important.
There is proper language that specifically states all things listed in Section 2 and within those criteria are enforceable at the disgression
of Square Enix. However, notice that none of the 8 subsections include housing. It can only mean that Square Enix currently does not acknowledge housing and related activities to fall under actionable violations. This only further reinforces that the Additional Plots and Housing Guide serves as an informative source for players and nothing more.
So to recap, a fact you say? Wrong.
You are wishing so hard for a conditional statement to grow up into the law of the land. Sorry Pinocchio, but that's not how logic and language works when you pay attention.