I have asked my tenants to confirm their contact info and names of all people living in the house including name and age of their children. 

You sound like you are trying to house hack like a single professional, not as a married couple with children.

Brian Douglas has a lot of great advice about asset protection and taking care of children through estates.

Yes...they sacrifice children at midnight and worship the devil (sarcastic voice).

Are you recommending that at some point it would be wise to purchase land to add property to for future children in a way to support them?

You may legally turn away families with children, however, if your rental property qualifies as senior housing.

yes, there is nothing better than being near your beloved children when they are playing slightly away from you :)

My family includes my husband, three children (ages 4 years, 2 years, and 4 months), and my mom who will help with the kids.

It's the perfect storm of low end houses (they look nice, but they are all builder grade stuff where they are throwing these homes up by the thousands every year), high occupancy with most stays having a high percentage of young wild children, and tired parents after a long day in the parks that are too wiped to police their kids properly.

'Danger to our children', 'Fire Hazard', 'I think they're cooking meth', 'I'm not sure but I think i saw weapons'.