The biggest risk you face as a landlord is putting the wrong tenant in your property. The damage they can do in a short period of time is astounding. The second biggest risk you face is not finding anyone to rent your property at all.
Yet, the gurus ignore the biggest risk you face and as a result many new investors make the mistake of focusing on getting the unit rented to almost anyone instead of renting to the best tenant from the best pool of available applicants.