Landlords don't increase rents to "cover losses". That's not a real thing that happens. Rents are set at the market rate, with some variance and time lag for price discovery.
No, that's not how it works. You're just making things up. There's no such thing as a "silent understanding" with a bank. Either that's a covenant in the loan terms or it's not.
I spent 3 years renting a commercial property that subsidized the rest of the property locations. As soon as my business left, the building and rest of the tenants were gone within 3 months.