Some people are mentioning how they’ve been successful buying OOS site unseen.BUT, let’s keep in mind that that was a totally different market ago where almost everybody succeeded (low rates, incredible appreciation etc.) 

And crypto is incredibly volatile. 

I’m biased, but I’ll chime in with @James Wachob and cast my vote for Memphis.Memphis offers incredible logistical advantages: the largest commercial airport in the world, all major US railroads converging here, and a thriving distribution hub.

Some properties are yielding decent returns, but most of these are not listed for sale.Tulum is an incredible destination for those who truly understand its charm and would enjoy having a second home or living here.

I think you’ll find it incredibly valuable and gain a lot of insights from it.Being on bigger pockets and listening to the rookie podcasts have been the most helpful for me. 

Cost effectiveness? 

As a rental strategy for non owner occupants, it absolutely is a fantastic way to generate the highest return, that's true.....but also, and most importantly, your screening has to be on point, and without that, it won't be as effective because one bad roommate can ruin the environment for the other roommate tenants. 

Ineffective or Absent Conflict Resolution ProcessEvery successful group of people needs an effective conflict resolution process characterized by:simplicity to understand and remember;quickness to start and complete;a clear vocabulary.My company, Livingsmith uses and recommends the 5-on-5 Process for conflict resolution in co-living homes.2.

Let's look at your example of a roofer, assuming he owns the company.He has to pay for employees- they still get paid, even if they are not giving 100% effort.He has to pay his workers to go back for warranty work - effectively paying them to do the same job twice.He has to pay for equipment, even when it's not being used 100% of the time.- but the company he bought it from still gets paid.He has to pay for advertising, whether it works or not.- but the advertising company still gets paid.He has to pay for accounting services, payroll services, tax services, legal services, etc.- they all get paid whether he makes money or not.So, what's your point?

Generally larger commercial properties and shopping centers are easier to classify with hard and fast rules, but to the points above the residential areas really move very quickly and have way more nuance than most people care to admit.zip codes are generally way too large for my liking at least in my market to provide any kind of insights other than macro level economics but even then highways or rivers that cut through a zip code can end up with totally different trade areas.we can get pretty granular with cellphone data and with grocery center data to understand the trade areas and their true boundaries, but that kind of data pull is generally only cost effective for investors doing larger scale projects or developments, and honestly we still just end up getting on the ground and feeling it out, so I generally tell people that the money is better spent on a plane ticket and weekend trip in the area you are looking rather than any kind of "trade area" level data studies.and generally B class in 1 area means something different than another.