Put it in an invitation style envelope and hand write or print their name and address on the outside of the envelope.

About a month ago,  my brother invited me to a convention up in Tampa,  where I've really had my eyes opened up to all of the possibilities. 

After purchase I had an email inviting me to a webinar training, that was it.

Hey Raheel thanks for inviting me to BP, it's really good place lot of information and lot to learn   

Good contractors are sometimes too busy for you to find.I would suggest posting an ad in the "Services Needed" section of Craigslist and making a sort of "open house" and invite any contractor interested in the job to come look at the property and give you their estimate.

If you would like an invitation, please let me know.  

Of course, before purchasing the house, I invited a home inspector, and he did a pretty decent job.

Find your local Landlord Association, get an invitation to their next meeting. 

My CFP brings in PE companies that gives us information on their business model.The ones invited in have opportunities that have been seasoned so there is a better gauge of their performance. 

You're buying, and you're not invited!