I would stop contacting him daily that seems excessive and if I was the tenant I would be annoyed.I am going to assume you gave 60 day notice June 1, which means he has until the end of July, which is still almost 2 weeks away.

Something that size would usually sag and crack before it gave way, and there's usually a moisture-related reason why it would sag and crack.Some people on this site have never seen an act of God they couldn't find a way to at least try to pin on their tenants.

@Josh Carr california also does excess proceeds tho correct?

If the tenant uses excess electric you bill them for the excess electric as additional rent. 

To handle the excessive water use in RI I have a statement in the lease that we can charge for excess use (regardless of number of people).

As mentioned, the freeze/thaw cycle combined with moisture can be a problem with it on the front range of CO.  

I would also take a moisture meter around the rooms in possible spots of spraying or missing the litter box etc.

The transfer tax bill you might have to pay on the assignment can be hefty, some parts of PA have a transfer tax in excess of 4% (and using a nominal dollar consideration won't cut it, since the PA Department of Revenue has a formula they use to set the value for which they expect to collect transfer taxes).The broker has kept this as a pocket listing so that he does not have to do a commission split; it's a commercial deal, that's how they like to operate.  

At the same time your builder is right in most cases, adding a garage to a property won't add value to the property in excess of the cost.

We charge rent based upon number of additional occupants in excess of two per bedroom.