I do allow adult guests with children, however I qualify them first.  

I have never leased a single property to multiple adult tenants unless they are a couple (not that I wouldn't or don't allow it, I just have never had that situation). 

I think it’s $45 per adult, which I then charge as the application fee.

I'm glad I missed out on that in my adult years.

I run a credit/criminal background on every adult.

Hi Gary,To be honest, the best approach (in my honest opinion) is to screen each adult over the age of 18 who plans to reside on the property and make sure that they're on the lease.

Probably because it represents your adult life, but trust me, people purchased real estate before you joined the adult world.When you say waiting for the next down turn, there is no historical pattern to support that another major down turn is coming.

Any adult must undergo a criminal and credit check and be approved by the landlord prior to occupancy. 

There is other language about not allowing any additional income-earning adults live in the place for a year unless they are listed on the mortgage.

In the meantime, it's sitting in a special Norwegian-sponsored type of savings account for young adults that can be used only for money that will be used to purchase property.