They told me they've started the process of hosting one to two foster children.

I'm actually really interested in understanding what can be done to control for the best outcomes of children.  

So his 1% rule included all furniture, personal property, chattel, etc.  

Especially if it's a property where children would be living.  

In the long run we're all dead, so expand the time horizon enough and nothing is sustainable as far as any of us are directly concerned ... short of that, I agree that you need to carefully define your time horizon and assess the impacts that has on your strategy before you answer these questions ... or sometimes not even short of that; personally, some of my assets will go to my children, so my time horizon for some investments extend well beyond my own death.

I have other children that would not fit into that profile, so a very individual decision.  

Then I had this couple with 4 children that booked for 4 days over July 4th.

Otherwise, I don't think you're going to get enough premium to make it worth it and most normal renters have their own furniture.

I apologize as I could fit the full question in the title.We currently pay our nanny/sitter $500/week to watch our two young children.  

In the past I owner financed a large portion of my houses and it has helped feed my wife and children so I'm not trying to complain.