You may want to check out some list building tools, or a tool like Batch for example that you can purchase data from, manage data, and cold call them all under one company's umbrella.I know this is an old post so would be curious what direction you ended up going here

This has been great most interesting batch of comments from everyone! 

We passed.We sent an additional batch of letters once we came back into the market later in the year and once again had some responses… we saw some interesting properties, although none panned out this time, this approach has worked well in ‘19 again, but I'll cover that in a few months...

@Shawn Sullivan I used batch texting!

I just sent out a batch of yellow letters and got my first phone call.  

Does anyone have experience in collecting GIS info from municipalities in batches?

(https://www.zeusauction.com)I'm used to the COUNTY.realtaxlien.com software where you put in bids and don't know the results until the batch closes. 

Does this also mean if a kitchen or batch remodel was done under $2500 it also applies?

I think the actual points and line items would vary by market, and we still tweak it (always between applicant batches) to get desired results.

If everyone else is going to vistaprint and getting a free batch of wafer thin paper business cards, go the extra mile and get heavy stock laminated.The same for your postcards.