[totony]

Does your friend need a second property? If there was such a ban someone else could buy it that would have stayed in it/rented it anyway

[stouset]

How exactly do you think somebody else could have rented that property if somebody wasn't allowed to purchase it for the purpose of renting it out?

[totony]

You misread what I said. The person would have bought it instead of having to rent it from your friend

[anamax]

Many people who rent do so because renting is better for them than buying.