I am looking for advice from people who have done this in the past.

Different people expect a different combination of risk/reward.  

Please note the information provided below is a layman's definition designed to provide a basic understanding for the general audience.

She moved out exactly a month if stay there and they left the place filthy also her son is not on the contract and I been told that many of them were living there while contract has only two people.

The stuff that needs done are some of the most basic things someone can do.

It is to get you to reduce the amount of time you waste looking at deals and knowing what is good and what isn't good for a deal.You'll also need to know the area comps, are people putting in wood flooring or LVP etc.

I'd suggest you ask as many questions as you can, there are a ton of people on here who are knowledgeable in many subjects. 

A lot of cities require you to get a work comp policy if you are an owner builder unless you hire all people with their own policies.

This really depends on what your looking to do however for a very basic overview far west side is great, downtown and very close to the Cleveland Clinic, Little Italy, Tremont, and Ohio City are still great areas.

Want to repeat what @Mike Terry said for the people in the back.