The form has to match the use
A homeowners policy assumes the owner lives there. Once it is rented, the carrier can take the position that the risk it insured is not the risk that existed. That argument happens after the loss, which is the worst possible time to find out.
Lost rent is a separate coverage
If a monsoon storm or a fire makes the unit uninhabitable, the mortgage does not pause. Fair rental value cover pays the rent you are not collecting while it is repaired, and it is not automatic on every form.
Liability sits with the owner
A tenant’s renters policy protects the tenant, not you. Claims from a pool, a stair, or a gate latch land on the owner’s liability, and in this market pools are common on rentals.