REI Marketing is a 5 - 8 FREQUENCY business.

I'm not an accountant, but here's some suggestions.If the frequency you are doing the bookkeeping is overwhelming, do it more often or hire someone else to do it. 

One of the biggest considerations is the frequency of violations.

I see the downside and understand how non emergency calls get old but in my experience the tenants usually think highly of you when you address any issue and the frequency of calls typically dwindles the longer they stay.

California is probably best known for this practice but most states have a required or suggested frequency for reassessment and are discouraged from using the sale price as an indication of the assessment because it causes inequities (those who have purchased recently have the highest assessments).

You don't have time personally for the other deals which sets you up to wholesale those deals to other investors.As for response, it will vary on several factors:- the quality of your data (list or data source)- how often are those people being mailed to- the quality of your envelope- the style and copy of your letter - the frequency at which you mail (most investors mail once maybe twice, although in sales most deals happen after contact 5)Track your response and make small tweaks and track the improvement. 

the one I am using is a bit pricey and I constantly have to play phone tag to adjust mowing frequency.  

I was thinking mailers and wanted to know some good companies to use, frequency, radius etc.

It provides a line item detail for each payment application to principal/interest plus you can change the compounding frequency.  

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