fix and flip question

[Matt Lewis]

I have a property that I am trying to purchase and flip but am unable to appraise for rehab costs do to the owner not allowing any walk throughs.  He is selling AS IS and advertising as a knock down.  I was able to check it out from the outside and barring any major issues I believe it could be rehabbed without knocking it down.  Any advice on a move forward with this would be appreciated.