There are several things that can make the net price calculators less than accurate.
Being an international student, and owning real estate other than your primary residence are two of those things.
Other things include being self employed, owning a business, parents divorced.
Your kiddo is an international student. You own rental property.
I would say…the net price calculator results should be viewed with caution.
Also, you say your income is over $250,000 which would put you out of range for need based aid at most colleges if you have only one kiddo in college.
And lastly…Columbia doesn’t give merit aid.
Where else is your kiddo applying?
If you are so concerned about college finances…why…why are you allowing your kiddo to apply ED?