An agent can run an illustration for you and tell you how much you should borrow. 

Illustration.

The responses to this thread with example numbers illustrate exactly what many others have said about not using a number for one region/property class for another.

I've included an example below to help illustrate this.So different lenders have different rates (which do vary even for DSCR loans) but these are factors they all consider.See example below:DSCR < 1Principal + Interest = $1,700Taxes = $350, Insurance = $100, Association Dues = $50Total PITIA = $2200Rent = $2000DSCR = Rent/PITIA = 2000/2200 = 0.91Since the DSCR is 0.91, we know the expenses are greater than the income of the property.DSCR >1Principal + Interest = $1,500Taxes = $250, Insurance = $100, Association Dues = $25Total PITIA = $1875 Rent = $2300DSCR = Rent/PITIA = 2300/1875 = 1.23DSCR lenders generally let you vest either individually or as an LLC.

For illustration purposes, I'm going to use the $5/month number, but it works with either the math is just simpler with the primary residence numbers. 

Quick illustration below:$30mm purchase at 3% cap NOI = $900,000 (30,000,000 / .03)Value at a 4% cap = $22,500,000 (900,000 / .04)Loss of $7.5mm based on a one percent cap rate rise.My advice for multifamily investors is to look at other asset classes.

At the bare minimum, put a Sports Illustrated Swimsuit edition calendar in there. 

Just read 'Set for Life' and you illustrated exactly the advice Scott Trench was laying out. 

Also this illustrates too, bunch of the leads that come through that you get charged for are not actual leads.

[the utility rate I show was for illustration purposes only]Good luck...its a minefield out there.