All without risking a dime of your own money.And the advice the other gentleman offered with respect to "SEO" and setting up a website-- you may well go ahead and do that, but good luck getting found easily and, also, trying to 'attract' "ma and pa" note sellers (which is most of what I chase) that way is tough because, in many cases (this is my experience and I've been at this 20 plus years) these note holders aren't very educated as to the type of asset they really own and have a limited or no understanding of their options (such as the ability to sell the note to generate cash).

Depending on the market you can probably get into a 5-10 unit property pretty easily.

Up & down the street there were easily 10+ other homes for sale. 

Factor into your cap expenses- loss of your furnace, water heater, and any thing of value that can be removed easily when it becomes vacant.  

Repairs can get done very easily, one piece at a time instead of pulling up whole sections.

The costs could easily be double what you estimated.

Here in Massachusetts a 4 family can easily have a water and sewer bill of over $200 a month.

It's hard to just use a blanket percentage of rental income without understanding the asset condition and class.Insurance- Insurance agent can get you a ballpark on this pretty easily especially for a run of the mill 3/1 rowhome.

I can easily get what I owe for my vehicle.

If they are professional, they can explain this quickly and easily.