Is it smart to buy a house hack that we couldn't afford without the rental income?

[Beth Anderson]

I looked at a house today that would easily be subdivided into a 2/3 bedroom home and a 1 bedroom apartment. But we could not personally afford the mortgage on this place without a renter. Do I keep investigating or skip it? Is there a general rule about how much of the mortgage you should be able to pay yourself?

Thanks!