Buying a Fire damaged home

[Tee Allen]

I am looking at a home in my area to make it my first project 

The home has fire damage and the owner is willing to sale 

Now i just dont know were to begin my due diligence 

I had ran the comps the house can go for 250-300k

im not sure should the house be torned completely down and start over or the house can be saved and start  building on it i need to know what i need to be looking for in order to make this project work