The tenant was doing just that with no problems until about a week ago the landlord got a call from the state police that there was suspected drug manufacturing and trafficking of a controlled substance.

Its always seems like as soon as you do phase 1 they find something that makes you jump up to the next phase so just be ready to pay more money.I have done a couple of these and I think they are a huge waste of money, but the lender I used required it.One them they said a liquid substance was on the parking lot and unable to determine what it is so they required more money and then when they returned it ended up being a dried up puddle of water. 10k later to tell me its water.Second one I did was by a railroad track and they made me go the full blown process because they found some coal on the property.  10k later they said it could be coal that fell of a passing railroad car. 

Unless you are in the RE game or have family in it, flipping is dangerous business. 

and you don't have surprises after purchase, the main danger is overimproving and feeling the need to rebuild everything because it's old. 

Even if the issue is on 2 properties out of 10, well they maybe exactly those rare opportunities that other investors overlooled.Same for Airdna or mashvisor.These tools are even dangerous because they present the results in such a nice professional way that a novice investor will trust the quality of the visuals, regardless of the quality of the underlying data that they ignore. 

@Umi Essien  You are getting some embarrassingly dangerous advice here. 

You can see by the above that a general cost for estimates is dangerous and no one likes giving money away.

Knife catching is really dangerous and its easy to get really hurt.  

You may find certain areas that considered "neglected" and even dangerous become trendy because of the prices are so low that it allowed young and trendy people to buy those properties for a few dollars (Happened in Detroit).

Substance still rules over form so it is good to be explicit.