These own-vs-buy comparisons always compare an idealized rental situation vs a concrete ownership situation. Its never realistic (although this article does acknowledge it: "My 1983 home had been used as a rental for years, so much of the maintenance had been neglected".

Specifically: people think about maintenance costs as a "con" in owenership, but its not like in the alternative (renting) you'll get all of those things for free. The owner just won't do any maintenance beside the bare minimum required by law.