Build a strong team, including agents, lenders, and property managers, and use tools like the BiggerPockets calculator to analyze deals.

My conclusion is that take the provided ROI calculations from REI as purely estimates.

A financial calculator and legal pad might work in the hands of someone who knows what they are doing, but that doesn't mean it's the best way to do it.

Use a quitclaim or warranty deed to transfer the title, and be prepared to pay Chicago’s transfer tax, calculated at $7.50 per $1,000 of the property’s fair market value.

Being a responsible person has nothing to do with the financial calculation for rate of return or cash flow. 

@Brett Coultas if you're a newbie, you want to be careful of an "investor friendly" agent selling you something they truly don't understand:(95+% of agents only know how to handle owner-occupied transactions - you can verify this by asking them calculate ROI for you or Cash-On-Cash!

Here's a bit more in detail about how rates are calculated for DSCR loans:1.

The property itself should bring in revenue ( even if you choose not to live in one side) and generally a bank will accept a portion of that rental income into the calculation. 

However if you didn’t calculate in at least some percentage of the rent for vacancy, repairs, and CapEx then eventually things will happen, such as a vacancy or a repair being needed and you will be out of pocket a much larger amount of money than just your $400.

Not all lenders are well-versed in these calculations.