Most people can't muster much sympathy for those who receive free money/houses and then use that unearned capital to extract wealth from active workers.

The moral action is to sell the second house, regardless of circumstance. The generous action would be to give away the house, in the same way it was given to you.

Land-lorders always insist they are the exception to the rule. They are not. They are part of an illegal shelter monopoly.