Costar is exceptionally expensive as has been eluded to here a couple times. 

A DTI (Debt-to-Income) ratio of 50% or lower, when including all expenses you pay/month, would be safe IMHO.

The only down side of the area is that all types of properties are more expensive.

Expenses: 1.

I am overwhelmed by the number of different formulas that are out there for rental property investing and I don't want to overpack for lack of better words my investing formula arsenal so I would like to know what ones are the best to use and whyThe ones I currently use include: COC, NOI (and NIAF), Cap rate, ROR, ROI, and IRR=But I also have heard of NPV, I am also not including any "rule formulas" aka 1% and 50% as those are simply guidelines to follow and not complicated formulasLet me know if I am missing any or don't even need to use some of the ones I am usingThank you,Peyton LaBarbera

Missing a few details—namely it seems your expenses seem high.

The overwhelming majority of legal issues between renters and landlords are security deposit suits.

Hello, I was reading the book and was wondering if you can share the link to download the flow chart income/expense. 

If possible, not use an agent, to lower commission owed expense (not sure if this is possible in Chicago, IL).

It'll be more expensive than normal loans because it is mixed use.