I narrowed my search down to a Porsche Boxster or a Mazda Miata

A 1999-2002 Porsche Boxster will costs 11,000-15,000 with about 65,000 miles.
The issue for me is the possibility of super high maintance and repairs.
I love Porsche and all of the cars they make. It has been my dream to drive a Porsche Carrera and I feel a good way to start would be a Porsche Boxster.

A 2000 Mazda Miata is selling for around 6500 dollars with about 70,000 Miles
Clearly the repairs will be cheaper than the Porsche.
The mazda seems appealing because it is sporty like the Porsche. Though the Porsche is a much better vehicle.
The Mazda seems to be less prone to unexpected problems and the maintenance is cheaper.
The Porsche is the dream.

My budget can allow these cars, gas and insurance. I have AAA and it will cost me about 120.00 Per month full coverage.

I am just very torn between the two.
The Mazda being more practical and cheaper overall.
The Porsche my favorite car and part of my dreams.

Please offer your opinion and advise.
Thank you so much for your time.