I just checked 5 bedroom homes in Kendall and the cheapest on the first page of results was just under $800k. The average (first 6 results on Realtor.com) is $1,029,333. With Columbus you have to check the various neighborhoods (like Kendall is to Miami) so checking one of the nicer ones (Dublin) I see 4 in the $600k range with an average of the first 6 results of $837,283. That makes Dublin (a suburb of Columbus with top schools and higher than average incomes) quite a bit cheaper in the huge house arena.

Kendall's average household income is $73,612 while Dublin's is $137,867. If I picked a neighborhood with an equivalent household income the price difference would be even more stark.