Quote from @Peyton LaBarbera: 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 LaBarberaIt depends what you are focusing on.

One thing to consider is how fast can you get the job done vs hiring out, and is your rental available dependent on when the painting is done?

This can be amplified depend on local laws and cost to evict.

Depending on location and condition recent rents for a one bedroom are $12-1500 and 2-3 bedrooms are from $1500-2300.

The downfalls are that customization can be limited depending on the company and also you will need very clear access to the site to deliver the pieces of the home and drop them into place. 

I understand using a PM with a LTR. 7-9% is much easier to absorb and worth the cost vs an average of 30% on a STR depending on where you buy.I am not sure about the 99% comment.

Depending on your specific situation, they may or may not apply. 

Think about things like the demand for rentals and the accessibility of facilities, schools, and public transit.Understand Property Taxes: Depending on the neighborhood and kind of property, property taxes in Chicago might differ greatly.

Updates/Upgrades with a 2-4 years payback will be done depending on my overall goal for the property.

Depending how fancy you want to get, it usually costs between $300-$500/sq ft in that area.