He was elderly, passed away and the children put it up for sale.

I just want to make sure that my children have happy childhood.  

The tenants are two sisters, each of whom has two children (so 6 people total in the house), and the house has 4 bedrooms.

The 2 family house was $27,000 at the time in a not so desirable area of Brooklyn, but I made the best of it because it was still better than living in an apartment with my three children.

Then you have Orlando and Tampa with theme parks for families and children.

His parents own 60 acres, and his parents' children and their families (including my potential partner and his family) live in various places on that property, and they construct their Airbnb units on this property.

Look up the guidelines on the HUD website under section 8 to see if you can get some assistance on how many people adults / children per # of bedrooms. 4 kids in a 2br isn't really sufficient either especially if there are boys and girls aspecting to share a bedroom. 

How close are you to good schools for children?

We vacation there regularly and wanted a vacation home for our children like we both had growing up.

As a state capitol with one of the largest colleges in the country, and as a base for many large companies such as JPMorgan Chase, L Brands, Honda, Nationwide and State Farm Insurance just to name a few, Columbus has a tremendous need for multifamily housing fed by a growing population, a low cost of living along with a high ranking as one of the safest cities for families with young children.