For most homeowners a 7 to 10 year fixed ARM will work, given the average frequency of moving. 

The more wood, the higher the frequency of treating.  

Here are the things you want to look at 1) Quanity - how many pieces of mail per drop 2) Frequency - how often are you going to mail to the same group 3) Mail piece - you can mail 6" x 11.5" piece for the same price as a #10 envelope.

I would be interested to see how the post frequency is growing monthly or some such.

We've not seen any difference in their frequency since we went to self-showings.

That is why a pipeline gets filled with a process in different stages of buying and selling to increase frequency of closed sales and transactions over time.Good luck.

Did get one call that said "your letter is distasteful"So what is everyone doing in their direct mailings...what is the frequency...when should I send the second round?

Although, this would differ from county to county, but the indicator assumed that influences in the frequency and speed of transactions between buyer and seller to be the fundamental basis of property taxation based from speculative land valuation formula.  

The key is to make sure you're doing enough VOLUME (i.e. 2,000 per month) and that you repeatedly hit the list (FREQUENCY).Your expectations on your first 2 mailings should be ZERO leads.

The optimal frequency with which to send out your letters and your ROR will be something unique to your market.