I don't know if I agree with your parent that rent should generally cover mortgage payments, but it should at least cover mortgage interest and other expenses,

I don't know if I agree with your parent that rent should generally cover mortgage payments, but it should at least cover mortgage interest and other expenses, plus a rate of return on top of that. You need to take into account the opportunity cost of ownership. In addition to the interest, insurance, maintenance expenses, and risk, there is an opportunity cost to the money tied up in home equity. In a functioning market, if two people start with the same amount of capital, one decides to purchase a home and the other decides to rent a comparable home and invest the difference in assets of comparable risk, they will expect to come out the same. There is a small net payment from the renter to the owner, but that is because the owner is being compensated for having their capital tied up in the home. (Or looked at another way, the renter is paying for the benefit of not having to have their own capital tied up in the home.) It doesn't appear that way in practice, because in practice 1) the home owner generally started with more money, which is how they bought a home in the first place, and 2) ownership forces people to save money. A renter with the same income could save a comparable amount of money to an owner, but on average they don't because there isn't a mortgage payment forcing them to do so. So on average home owners tend to be wealthier than renters. But there's nothing special about ownership vs rent (besides forced savings) that causes that to be so. Rent is not a wealth transfer from poor to rich; it is payment for a service. Now, if house prices are depressed, like with any asset, it is possible that ownership will temporarily be a good deal. (And vice-versa.) In a situation where the market has taken a plunge, one might be able to buy in at a level where they could be cashflow positive from rent, even including un-rented periods, to an extent that over-compensates for the funds they have tied up in the house. However, in that situation, people will rationally buy investment properties, increasing demand, and returning prices to a more rational level. (Likewise if houses are overpriced, eventually people will stop buying them because they don't expect any return on the investment, which will cause prices to drop.)