Does the 50% rule hold true for lower end properties?

[Gary Dezoysa]

Hi, I know that if I compared a $30,000 house renting for $600 a month to a $120,000 house renting for $1,600 a month, the cheaper house would have proportionately less property tax and vacancy factor, maybe also insurance.

But it seems to me that hard costs such as those for repairs and maintenance would be similar, which means a higher expense ratio overall. With this in mind, does the 50% rule (50% of gross rents go to operating expenses) hold true for lower end properties?