perhaps you don't understand the time value of money?
Even more simply, when you borrow $100K for your house for your mortgage you actually end up paying around $300-$400K over 30 years depending on your interest rate. Also add into that the value of that money at today's value vs. what that money is worth 30 years from now and the actual "cost" grows even greater.
Just because it's the baseball field is something you want doesn't make the laws of finance suddenly not apply.
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