I remember the late Max Conrad (a professional ferry pilot) in the late '60's attempting the same circumnavigation. He actually planned a tech stop at the South Pole In a Piper Aztec. However what wasn't planned was a "whiteout" on T/O. and the aircraft sank into snow. The aircraft is probably still there. I remember there being a bit of a storm as to who was going to eventually pay the costs of getting him off the ice.
I wish this guy luck and admire his spirit of adventure and endurance.