As an owner of rental property, they count against your operating expenses just like property taxes.Learning to operate within established limits has it advantages.

We purchase our student rooming house as a "home" for my sister-in-law {she does live there ... see below} and, because of that, the rents did not count towards income for the purchase.Clientele: When we looked at rooming houses we found three basic types of rooming/boarding house in our area.Student - there are two universities and community college in our little city, so students are a prime clientele;Industry/Organization/Institution - another type of rooming house is one which is near and caters to a particular employer/workforce (i.e. a factory) or institution (hospital, military).Social -  the third type in our area is the rooming house that caters to the working poor, the addicted, and other on the edges of society.Each of the above types of rooming house requires a different set of skills and management style.  

He's at his desk opening money bags, counting coins singing:Ringle, ringle!

Count on paying for the information.

The short answer is that they might follow through but you cant count on that. 

Be very careful how you count the days.

They have their "standard" wait time for the rental income to count, some one year some two year.  

Now we use different accounts when there are different ownership groups and equity shares involved in the ownership of the property but everything runs through 1 management account, 500+ units and counting it's the most efficient method. 

You can use modest leverage or high leverage.By the way if you are counting on 12% in the stock market long run you are a fool.

I have 7 and counting Rooming Houses and my rents average around 799.