What am I looking at?

[Yatznira Rodriguez]

Hi all. So, I just came across an 1880s construction SFR that seems like a gut rehab. The problem is there is an old oil tanker buried in the back yard that needs to be removed causing a possible environmental promblem. What am I really looking at here as far as cost and risk? Is it worth taking on with a ARV of $200,000? The asking price is $40k and it is a bank owned property.