"Sir, when do you want to buy the houses?"
Translation:Señor, ¿cuándo quiere usted comprar las casas?
No. If there's no question word, it can go first and it's all in the inflection: ¿Usted quiere comprar la casa? But as soon as you add an interrogative, like cuándo, qué, cómo, etc., then it's more natural to put the pronoun after the verb: ¿Cuándo quiere comprar usted la casa?
I think it usted comes before comprar because it makes it clear that 'you' is operating on the second verb comprar and doing the buying and not just the wanting.
In a different situation you might want to say 'Señor, ¿cuándo quiere ellos comprar las casas? If you wanted 'them' to buy it.
It does show that ¨usted¨is to be used. Señor, will not be mixed up with the informal ´quieres´etc---its like us normal people walking up to the queen and addressing her as ´old girl´or ´mummy´.
¨ustedes¨is also formal but is plural so we would have started with ¨señores¨
I wrote "¿Señor,cuando quieres comprar las casas?" I umderstand that "Señor" Implies Formal But In English,We may use the term "Sir" even in Informal Context So Why Would my sentence still be considered incorrect And In Which Case, while Respectfully addressing a Man, Would It Be Deemed Correct?
All sentences that don't have any context allow for both variants.
But if there are clear hints by the context, of course only one of them is adequate. This is the case here. If you call someone "Sir", only the "formal" way of addressing him is adequate. That's the rule.
Didn't you notice the difference between these sentences? The definite article is used when you talk about persons (3rd person perspective), not to them (2nd person perspective).
It is not inconsistent at all, since there is a rule behind kit. And this rule has been explained many times alfready in the comments.
You have to use the "formal you" for every person that is not a close friend of yours, a family member or a child. And if you address someone by "Mr.", chances are he's not in that group.
You have to get used to using "usted" for most people you don't know too close or you would be considered a rather rude person. It's not only for "the palace".