I am more than happy to invest in SEA... I am just not going to invest in something that is SEA only. It doesn't achieve anything, right now, for a number of reasons. The first reason being that the player numbers are just too small. The skill gap between last and first is too great and the exposure is miserable (almost 50x less than an international event).
One idea I have been personally toying with is an NA vs SEA style tournament. The fall of NA and the rise of SEA should keep it relatively even in terms of skill and the viewership will be triple that of any SEA event. More viewership = more money, plain and simple.
Money where your mouth is.
Host a tournament where you send the winner to MLG (interchangeable for, IEM, GSL, Dreamhack etc...)
meets all of the criteria you've mentioned... and will prove that SEA can compete with the rest of the world.
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