I went deeper into his educational material and found one of his courses, but it was $750.

I will suggest that a seminar that sells training materials only would not have helped me. 

Contractors stated that he does surface level cosmetic fixes as fast as possible to pass inspections.

There's some excellent relevant & recent material from very high quality individuals on this forum.

When you add purchase price, carrying costs for at least 6 months, materials, labor, real estate agents costs and taxes, do you have at least a projected 10% profit?

Quote from @Ricardo Polanco: Good evening everyone, I am evaluating the possibility of buying a multifamily property in Scranton, at this moment it has 2 apartments that only need cosmetic repairs and it has a big 2nd floor unit that needs a full repair.

Price out as much as you can in terms of materials and estimates.

I own a licensed gc company so if it is in a decent area I know I can add alot of value to it at a cheaper price since there won't be any labor or material markups.

However, for building materials, we get 99% of them from the four mentioned!

You may be able to lean on the title company if they missed something, but generally if the deal closed and its not an issue of material disclosure or title or something its generally your issue now, the owner doesn't really have an obligation to comply if they closed according to the CD you signed.