Very hard to make those leak, outside of physical damage.

Is it their behavior or is there a physical difference?

I'd rather have one certified and paid lifeguard have access to my family pictures for the sake of protecting the pool against unauthorized use and abuse by outsiders when the alternative is having 100s of unauthorized strangers have physical access to my kids and family because the lifeguard cannot differentiate who does and does not belong in the community pool area.

A physical address on the card helps build credibility.

Your confidence will increase dramatically if you physically inspect the properties.

All those lazy retirees, students, single moms and all those sick or handicaped/physically challenged people, where di they come from and why are they even here?

I've been working in different biochemistry labs for the past 5ish years and just like my career in science, I can do all the research I want, but I really only learn by getting my hands dirty and physically doing the work.

Are you asking how I find these type deals or how do I physically gain access into the properties?

I've made many offers without physically seeing the property first.

Of course the actual physical repairs done between tenants also has a direct bearing, but that should be mostly in your control. 5% has been a long term average for me, but some properties will sit longer no matter what.