I sometimes have one or two people mention a service dog but this spring I have 2 vacant properties and every other caller has a "service" or "therapy" animal . . . or three!!! 

I want to make sure they massage the callers and be skripted robots.

We bought upper lower end in primarily blue caller areas to start off with and rarely came close to needing all of the $25K.

It won't show the actual caller but can differentiate your calls. 

Then take a tally of how each caller heard about your property to see which one works the best.

Not sure what volume you are doing but setting up a Google Voice account and forcing every interested party to leave a message is a great way to filter out serious vs non-serious callers and prevent yourself from wasting time answering too many calls.I don't have any experience in these type of direct mailers, but have worked extensively on different email campaigns in my previous jobs.

It saves you from having to deal with a lot of the unwanted responses and having to educate any callers about lease options.  

Most/all has been said.Understand the caller's situation and obtain the appointment where appropriate

All three callers told me that they only owned the land the property was on.

Just for laughs :)https://www.youtube.com/watch?v=XrrZnwNnikk