Does the 50% rule work well with cheap properties?

[Sean Dezoysa]

I was looking at this property and realized with the 50% rule, it would cash flow with a $30k @ 9% loan, assuming no repairs: https://www.zillow.com/homedet...

So either the 50% rule doesn't work well for low end properties, or investor friendly markets need private money marketing, not deal marketing.

Anyone care to comment on the validity of the 50% rule here? I know it varies by the house but I'm asking about validity for low value properties in general.