With larger multi-units, there's a common issue I call the "chronic disease of a fourplex": - One tenant might leave within a couple of months, with or without a valid lease

They are not checked for disease at the boarder, they are given airplane flights to your city with no TSA check, (they have no Identification) and are told to report to immigration processing two years from now which less than 1% follow that requirement.So, bottom line, I've bought houses from illegals, I've sold houses to illegals and I've hired illegals.

it's tax-free for something that you can't enjoy until someone is older enough to have a stroke,cancer and other diseases.

Maintain your hot tub properly so no one gets "hot tub rash" or Legionnaire's disease. 

This seems to solve the symptom but not the disease which is the disrespect.

Don't get the door disease and feel left out because you only own 1 property. 10-15 years from now, 2-3 multifamily properties in Boston will obliterate a pile of doors/cheap properties in a rust belt or low cost market.

In fact, it takes away value, like a disease. 

Last thing I'd want is a source of disease and other nastiness rotting away inside one of the walls.

Recently hadm.y mind blown by Rich Dad Poor Dad.My family and I have been slowly climbing out of debt, mostly due to medical bills from my Crohn's Disease.

Rodents are dangerous, they carry diseases.