I don't think there's enough interest to raise $10 million.
On what planet?? Tiger draws casual fans into watching the game. You the WRX golf pro who knows everything there is to know about golf may not watch but my 70 year old dad who does not even speak english let alone watch golf will tune in because he likes Tiger Woods.
$10M might be possible, but it is pretty ambitious for a presumably one day exhibition with only 2 players.
The purse for most of the majors and the Players is about $10M (US Open is $12M). Those are real championships, with four days of coverage.
Tiger's own silly season event (also a 4 day tournament) has a $3.5M purse.
And you are comparing this to golf tournaments because? This is not a golf tournament.