A pre-approval usually involves providing real information to the lender and having them issue a light approval, which is then subjected to the full underwriting process.Sometimes they are used synonymously, and sometimes pre-qualified doesn't actually mean anything at all. 

I get that your property is almost brand new, but its better to be conservative and pleasantly surprised than overly hopeful and extremely disappointed.

In fact last owner started reno because there are like 150 sheetrock sheets and the roof is brand new. 3 floors and 3700 square feet brick house built in 1929

The sheriff told me that legally there is no proof that she lives there since she is living with relatives and no utilities especially in light of the fact that the previous owner is now non-communicative and actively dying.

Will you be completely re-positioning the property or just doing a light refresh

Like hallway lights.

@Nicholas GrayYou may want to check out the ductless mini split systems (Mitsubishi is one brand).

I am brand new to real estate investing, and I have already assembled my team, and I am looking to purchase my first house hacking. 

However, the loan payments on brand new 25 unit are quite  high and so shouldn't I consider the loan payments that the project supports as a gain as well? 

I know of a developer that builds shoddy retail centers and slams in single unit unknown brand tenants.