This is the approach I've taken after making one of my first mistakes early on in my investing career, and it's the same methodology we employ with all our investor clients.Good luck!

Anyone else have any other methodology or source? 

So our goal is to acquire the home/office addresses for owners of facilities in order to insure they see our mailers.My methodology so far has been to go county by county, identify all self storage facilities on Google Maps (double-checking with our database to make sure I don't miss any not on Google,) and entering the addresses into a tax parcel GIS unique to the county.

and sometimes I'm not the most practical person in my methodology.  

I employ the same methodology.

So, when I finally decided to quit my career and start my own real estate investment company, I had all of these...mechanisms and methodologies...engrained in my head as the right way to approach any problem - PARTICULARLY, the right way to run a company (and I still believe this is true).So, through my real estate journey, I have noticed that most (not all) real estate investors don't really like to, nor see the need to, approach investing from a bigger picture.

LLC’s came into existence in or about 1977, whereas Corporations were recognized under ancient Roman Law.

BTW:  Much of what you read about wholesaling methodologies in the U.S.A.- even here on BP - is not legal either.  

Interesting story, and remember ancient Chinese saying, there are many flowers in the field.

I realize this thread is ancient but I am attempting to put together my first mailer for vacant lands and was wondering if you might be willing to share some of your postcard templates you mentioned above?