It hardly ever rains in Las Vegas.

I am hoping the current owner takes care of the eviction (so they can have the judgement for back rent), but what if they do not?

You don't want to fall so in love that it clouds your judgement but it does help to have some inner connection to the property. 

@Nick Merryman   actually with that low of mortgage and making assumptions that tax's are low and the foreclosure has not drug on for years.. and their are no other junior liens or judgements this person could get a really nice chunk..

It is your call whether you want to ask the judge for a monetary judgement or if you only want possession back.  

So when it rains the water would (or at least looks as if it would) go straight into the house.

However, you can ask for anything in your suit for judgement, if the defendants don't answer, you have a default judgement; the validity of the claims is no longer able to be challenged.

From what you've written, it seems like John has a solid case to get him evicted from this half of the duplex and may be able to win a monetary judgement for the "damages" Jose has done to his property.  

In Texas,  wages cannot be garnished to satisfy a judgement 

This area here is desert land and it seems that one season is more drastic every year (either ice, wind, or rain), but it's manageable when you're aware and proactive.I'll see you around and good luck with the weather.