They will help you identify a solid cash flowing property.During the mean time, you should be learning as much as you can about the rental game, so you know exactly what you get into and how to identify a cash flowing property on your own.

Everyone responds to risk differently and there are some very good responses here that help you identify some of those risks.

Or was it more of a recurring pattern... such as first week of the following months etc. etc.

If you identified that Multifamily is possibly your thing, I suggest you ask there is there are nay MFR meet ups in your local market. 

Are there any strategies for identifying the proper timing between serial vacancy and high demand?

Once a property is identified, how do you find the owners information to then contact?

@Fred Avery just make up a number based on the weather pattern.

Doing a mild inspection with pictures- My inspection would consist of identifying appliances, capital expenses, and overall condition such as moisture or structural issues, This will include a lot of pictures approx 100-1505. finding an investor to flip the property to. 

What is the best way to identify markets I can concentrate on in order to implement SFH brrrr strategy?

We are looking in the Southeast and Midwest but lack experience in identifying what areas are not saturated with investors, making it harder for newbies to gain a foothold.