That is horrible advice. Most landlords use management companies and don't do any work by the way. Those financial institutions are the devil and the reason rents are skyrocketing.

Investment groups and private equity have been buying up residential properties like crazy for like ten years and it's coincided with the meteoric rise in rents here. Gone are the days of 600 dollars a month, you are lucky to find 1,100/month now, which, and this is true, is more of a rise than in wages, or inflation, stated inflation, or the real inflation (which averages 5-8% historically but has been much higher these last years,) but since we don't use real inflation anymore but a several times over bastardized version to return lower numbers (from the 70's they changed it multiple times,) that's just for our reference.