I only bought 1 property that year and I screwed up not buying 10.Recommended listening: BP Podcast 311 w/J Scott & MadFientist Podcast w/Michael KitcesKitces mostly talks the 4% rule (which is pretty good info) but briefly touches on market cycles and historical frequency of downturns/recessions. 

What's the frequency of rental ?

Currently I have $30K working capital and I am working about a (3) county spread in which rentable SFR are easily obtainable on a decent frequency for between $20-40K.

This was also part of why they chose to leave western Pennsylvania and go places where the job markets were better in their fields, leaving the parents behind in the family home.Sooner or later, the house ends up empty and in the hands of the far-off kids, who with depressing frequency get the bright idea to run it as a rental.

It does indicate the frequency of payouts.

Because of the frequency of transactIons it makes thIngs go smoothly.

Frequency:  New Letters sent every week.

Rent control may also limit the frequency of those rent increases - typically to once a year.A rent hike every two years should be expected to keep up wIth inflation.

The frequency will depend on how much you collect, and your state will determine that and tell you.

The core criteria to consider for your area include:- number of well paying jobs in the area- number of people moving to the area to take those well paying jobs (short-term assignments and indefinite)- number of employers who move workers into the area to fill those jobs - frequency of 30+ day vacationers If the above economic criteria look good, then there are a few basic criteria for the unit itself:- easy parking- decent neighborhood- kitchen or kitchenette- low price per bedroom compared to an extended stay hotel Good luck!