For example, you could print high-quality postcard-size flyers for a direct mail marketing campaign.

Postcards dont usually work for these types of owners.

They obviously didn't intentionally target you, they are just humans with no clairvoyant abilities and can't know all the particulars of each home owner when they send those post cards.

lots of owners of distressed properties get multiple texts, emails and postcards a week. 

They typically mail out a small post card notifying you if the policy cancels or is non-renewed.  

Should we do this or would it be better if we designed a postcard online to send out?

If post cards at $0.6 each this is 5k x 0.6 = $3000/mo. 

All letters, a mixture of letters and post cards or what and how often?

Direct Mail Campaigns: Think about sending postcards or letters to homeowners in specific neighborhoods, especially those who might be facing financial challenges or have inherited properties.

Hello,Curious to get opinions on effectiveness of using postcards vs. hand signed and addressed letters for marketing.