I know the "50% rule" is bandied about as gospel here in the forums, but haven't seen any actual, hard data that says that operating expenses tend to be ~50% of gross rent income. I'd like to verify this number is, in...

This question is one I pose to anyone who has an opinion on the topic. Obviously we're all here because we like something about the idea of REI and passive income. As the process goes, we find a "good deal" in some ar...