It is your responsibility to find the right answer, give a clear expectation to people you hire, learn about the house and industry.

Do you guys ever take the risk of buying a foreclosure at sheriff sale with the previous owner still living in it? How do you calculate rehab cost given you can’t look inside?

Hopefully the permitting people are nice and will offer some guidance.  

I've listened to a lot of BP podcasts and other real estate youtubers, but most of those people invest in places where real estate prices are 3 or 4x what they are here.

What we have learned is that most people avoid these properties entirely, which allows us to purchase them at a significant discount.

While you're reading, watching videos, talking to people online etc always have some way of taking notes.

Let your criteria do the filtering for you.Regarding retention and renewals, the only time I have asked people to leave is when they have had rent payment issues and/or damaged the property. 

You will meet a lot of great people here that will help you on your journey. 

Most people who advertise credit repair are just an agent for the real company that does the repair. 

Chicago need another million people in population to force us to push south.