The Roth Factor.

@Tom V.Thanks I will factor that in future investments. 

This can begin with an informal process where they will actually visit the property so they can complete a more accurate appraisal and often results in a reduction if there were issues with condition, functionality, or external factors they had not considered originally.

It could be the car loan (which I agree you should list) or other factors.  

I am interested in knowing how to factor in possible plumbing related issues.

In most C areas that rent for $600 a month in the mid west my experience is that will have higher vacancy rates and higher costs to make the u its rent ready when tenants move out.I would factor in 15% vacancy and 4k to make rent ready again when a tenant moves out. 

For rentals lack of basement is usually not a major factor, especially in West Allis. 

We also adjust the amount we'll lend based on those factors.

One of the best courses I EVER took was a course called "Tax Factors in Business Decisions" during my MBA.  

So now our numbers look kind of like this: P&I Payment $11,552, Management 8% $1,632, Vacancy Factor 10% $2040, Insurance $1,100, Repair and CapX 10% $2040, Taxes 1.25%=$2,500.