Such statements are mistaken and much too broad. 

Of course there is a spectrum between Ohio and Aspen.

Saying the city of Philadelphia has experienced no rent or property appreciation since 2018 is a very broad statement.

Its hard to make broad appreciation vs cash flow assessments without looking at the individuals goals and situation. 

- https://www.biggerpockets.com/files/user/CosIorg/file/asset-protection-spectrum-diagramHow a fully implemented asset protection layout might look. - https://www.biggerpockets.com/files/user/CosIorg/file/asset-protection-structuresLet me know if have questions or want to chat further - I can give you my investor perspective.

- Turn key gets you closer to that impossible side of the spectrum.

@K S.I don't understand the statement that the the broad market index fund returns over the last decade or 100 years was luck.

Good strong rents and hard working middle class tenants over here broadly speaking and appreciation has been my friend the last few years.

As a broad rule of thumb, the 50% Rule for SFRs states that about half of the rent will go to non-mortgage expenses.

This is ultimately a very broad question.