Paul is a retard. He will not beak even, I doubt he will even be able to sell it at any price.
1, The land is completely destroyed, all topsoil is lost and it just looks like a moonscape.
2, The buildings are basically condemned for human habitation at this point. (Minus the parts of the building they used as firewood.)
3, Land is cheap out in the middle of nowhere. After you turn it to a martian desert the value of the land basically becomes zero.
4, The land has several serious and very expensive biohazards that any new owner till take on liability on. (massgraves of hundreds of medium sized farm animals)
The worth of the land is negative. Possibly significantly negative. He will never sell it. His only option is to default on the loan so the bank will repossess it and take over liability for 4.