I'm not forgetting final criteria like fit and budget. (recareered.com)
So get to know your market and then use these rules of thumb to focus your search, rather than using them as final criteria. (biggerpockets.com)
When it comes to some of the «rules of thumb» like the 1 % rule and the 50 % expense rule, these are really more quick analysis tricks to help you understand whether a property is worth looking into further... not final criteria for whether or not you should buy. (biggerpockets.com)