One of the first things I would recommend is to determine what your investing goals look like. 

I would suggest spending some time determining what strategy you will employ to generate the return you are looking for. 

Contractors won't waste their time giving estimates so you can determine an offer price.

Renometer and BP insights are great tools but if your looking for something quick and dirty, and free, I Ike to use the HUD Fair market rent numbers.This is published data by HUD to help section 8 and other voucher programs determine the maximum allowable rent for given markets across the country by bedroom count (1-4 beds).

What’re the steps that an investor should follow during the due diligence process when analyzing a property to determine if it’s a good deal and safe to purchase?

But the market price of other multies, just 4 blocks away, are about 1/2 of this property.Will the bank rely on comps, or will the bank rely on past rents to determine loan amount?

I'm considering investing in a Apartment building rehab and trying to determine if its a deal.

But debt does not determine your profit when you sell. 

What the formula used to determine pmi?  

The carpet was nowhere near new, so how would I determine how much she is responsible for versus how much of it was on me.