So is having a child and needing a bigger place. 

I don't remember seeing the video on Brian's page before signing up with him, but even if I had it wouldn't have deterred me as I am not afraid of being pushed and I am not allergic to curse words.

This year I have signed leases with 2 different tenants who have a small child.

One million is child’s play!

Part of that negotiation will be for them to pay your broker, or simply lower the price enough for you to pay your broker directly.Some FSBO sellers have an allergic reaction to buyer brokers, in which case you may offer to work with directly, without having your broker between you and them.

My question is should we start an S corp with child LLC's for each property or start out with an LLC? 

Not sure if the same will apply to an adult child.

My Mom just passed away (I’m an only child and she had a brutal death; I was her primary caregiver with little kids in tow), this is my childhood home, and this tenant is clearly a con artist.  

If they're your parents, or a child, that's one thing, but owning rental property to supplement someone else housing costs is not a good investment strategy.

That is my opinion.If you add more homes to your portfolio, I would look at setting up a series LLC with each unit in it's own child LLC.