Cap X refers to capital expenditures which is a term used for structural components of home that have a limited life span and will need to be replaced at certain intervals. 

Half the benefit of owning real estate/rentals is in the taxes, so just make sure you've got reminders on your calendar to assess where you stand at regular intervals!

Should the agreement mandate reporting an intervals of more than once a year?

I had success with real estate express, I really liked the format and it was easily digested in 5-15 minute intervals.

You need to set a budget that will allow you to send mail, to a substantial number of individuals, at regular intervals. 

You'll also want to send on a consistent basis, like mailing out every X period of time, as mailing out in random time intervals isn't as likely to produce results.

I'll schedule appointments to show in 15 minute intervals.

Some are a set fee at different intervals, like $25 after 5 days, $25 more dollars or a percentage of rent, or a daily amount until rent is paid.

This also moves very fast since you are moving from refi to refi (6 month intervals) instead of from new accumulation of cash to new accumulation of cash (for each next house).

It turns out it was all about not reading the bill was for two months ...So it seems somebody neglected to pay electricity in one prior month, and then blame the landlord without even looking at the billing interval or the previous account balance on the bill.