Okay, I got a number of issues with the whole business of tournaments in 0AD, broadcasting them, prize money - and the proposed funding of this specific instance.
I'm going to deal with the latter first. @DerekO - you're what now, 14 or 15 years old? While I don't doubt you have $1000 knocking around - and if you do, technically it's yours to do what you want with it, but I do have serious concerns, if 0AD players really want tournament play with cash prizes, as to why a 14 year old should be funding it?
From what I can tell, the business of monetizing any part of 0AD officially, even if it's to generate prize money for a tournament, is a major administrative nightmare, and anything 3rd party is currently as unofficial as it gets. In the event of a private tournament being run by a third party, WFG would have to distance itself from it legally in the event of any potential issue that might come up, such as reports of cheating, technical issues, disputed results and ultimately, delivery or non-delivery of the promised prize money. Not to mention the person putting up said prize having the capabilities to wire prize funds to potentially any country in the world. Tournaments involving money need at least some form of regulation, they can't just be thrown out there on the fly. To my knowledge, hardly any of the free tournaments I've seen have managed full participation by all players or reached a satisfactory conclusion within a sensible timescale. Tournament play in 0AD is nowhere near mature enough to support the sudden introduction of cash prizes.
Regarding tournament play itself, without an official means of hosting tournaments within the game lobby, the whole thing would be a bit of a DIY effort, further relying on third parties for tournament structure. WFG and the current dev direction of 0AD have shown no particular priority towards formalising tournament play in game at this stage.
Add to that the practicalities of players from 0AD's international player base in all the different time-zones actually taking part and the chances of technical fault free competitive play are severally limited.
Finally, 0AD's current potential streaming audience is tiny. I do video on demand, mostly, with the occasional live recording - that I still edit to meet certain base production standards, and the final product is still VOD released to a schedule. If the VOD audience were to grow by a significant factor, regular live streaming would be a viable pursuit for the investment of time into it. Right now, it simply isn't, the metrics aren't there.
I love the idea of tournament play, it adds a massive narrative to a series of games, they actually mean something - people can get invested in them. But right now, there simply isn't anything like enough of a professional or technical infrastructure to support it.
Sorry, I probably sound like a complete old party-pooper, but I see more immovable obstacles than I see good outcomes at this time.