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. 

So even if they are on one policy or all on one, the same situation of frequency could occur.

Notice periods vary based on the amount and frequency of changes.  

Adjustable rate allowed but restrictions on the amount of increase and frequency of rate adjustments.The loan cannot include a balloon.Seller must not be the builder.More Than 3 Properties You Must Use a MLO and Comply With All Regulations Such As:The loan cannot include a balloon.

It depends on your goals, what returns you'd be getting on your property, and many other factors.Timing and frequency also make a huge difference.

As for the free converter boxes, the FCC is happy to provide them, as they'll make much more money off the freeing up of the spectrum frequencies than they'll spend helping people convert.