So, it's still a viable way of investing, but does not have the same scale of success in today's economic environment in higher appreciation markets.

Especially for things like population growth/decline, economic trends etc.And what things do you recommend checking when trying to decide whether a location is a good place to invest.

These are business purpose loans so there isn't any sort of red tape when purchasing multiple properties at once or one after another.

I don't really want to invest in a D-class area.Tangentially, what are some of your "it's time to sell this property" red lines when it comes to the changing economic conditions of an area? 

Which would be more effective for pitching my Airbnb arbitrage business?

I understand some of the economic factors that can lead one to a particular city or province (or state), but unsure of some of the key elements as you funnel down below that level.Appreciate any insight.Tyler 

Multiple investors with decades of experience, some GP, some LP, some skeptics about the entire business in general sense and some bulls who have gotten rich from investing have all chimed in on this you got links to specific case studies from Brian Burke, a seasoned syndicator, a guy check from Melanie p, who makes it a part time job taking the trash out and exposing the shenanigans of one syndicator after another.Greg Scott has an excellent reputation on these forums, and provides a counterpoint to Melanie’s skepticism.

I own a small multifamily commercial in Albuquerque and can confirm the diversity of the economic and cultural factors that you mentioned. 

Rent control advocates will state it is greedy landlords because they have zero knowledge of basic economics.

@Tonio PearceYes you should create a business plan.