She'd alerted me on the first that for the first time she was short and asked for an extension.

Luckily, I do have an extensive text chain as evidence.

In any case, I wish someone would have written extensively on the turn-key process, interviewed several Turn-Key companies, and spent a hundred or so hours gathering due diligence...and then posted about it.

Neither of us has new construction experience, but my FIL has extensive rehab experience and is used to dealing with contractors.  

This property was a shell to begin with and I am getting an extensive rehab done on this (close to 100 k). 

We haven't talked about the details yet, but I am under the assumption we would both like to do this extension outside of VRBO.He stated that if we are to extend his stay, he would prefer to pay us at the beginning of a month, for each month he will stay going forward, instead of paying one lump sum like he did on VRBO.

This won't be possible in the time frame given, but you may be able to get an extension.

This looks like a very extensive and well run site.  

I understand this could be a wireless reader or a data reading device that plugs to a data extension cord. 

It is a very extensive lease and will take care of your needs.