(Especially a 2-4 unit.)Do they have friends/relatives/co-workers that would rent rooms from them if they bought a property to show more income?

A client of mine in Maryland added smart home features to their rentals and boosted rents by 12% with minimal investment.

I am trying to calculate my returns over a 10-year period using the rent-by-room strategy, which results in significantly more cash flow than traditional rentals.

Quote from @Nilusha Jayasinghe: Hey all, I'm a smalltime investor currently living in a flat of a Chicago 2-flat while renting the other out, and also have a SFH rental in OH. 

Renting out technically may not be legal for this property. 

They're currently renting in Denver under only the guy's name but since the girlfriend is pregnant, they need to move to a bigger place.

***BUT keep it ***B - Buy it F - Fix itLive - Primary Residence itLeave - Keep it, rent it out, and find a new primary residence What made you interested in investing in this type of deal?

You could either sell or rent the in-laws' home for a year, move to Arkansas, live in the duplex for a year and move back if you decide you don't like it.

All original tenants were long term low rent tenants.

They highlight the difference between the average home cost and the average home value suggested by the price of large institutional companies such as American Homes 4 Rent and Invitation Homes Inc.I suspect this is nonsense (especially as according to google their price to book ratio is positive).