How much money would I save, paying cash as opposed to mortgage?

Mr. Spin asked:


$90.000.00 at 6.25% fixed rate for 30 years (not including taxes, fees, etc.)

I went to an online mortgage calculator and keep coming up with over 100K savings! Is this correct?
I do have the cash and signed the papers. People think I am nuts for paying cash, but I look at them thinking who is the real nut.
I am not worried about write-offs or investing the money. I have to live somewhere instead of an apartment. Most importantly, I want my kids (while they are young) have a place to call home, friends and memories.

If needed, I can get a mortgage and buy another house and rent it as apartments and break even for the next 30 year.

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