It’s funny because this question always reminds me of language classes when trying to learn how to use the subjunctive/if-clauses/imperfect subjunctive. Usually the responses were fairly run-of-the-mill because everyone was too freaked out with trying to understand the subjunctive.
In reality, my response is boring… I’d buy a house, a detached house, and preferably it would be several hundred meters away from my neighbours. Beyond that, I’d use the rest for travelling comfortably and staying in holiday apartments or quirky hotels.