I can see that you are starting to think that your idea is a winner and that everyone else should do their thing to make your idea work because, in your head, there are no down sides. This includes someone else paying for scaffolding because you are, as you say 'supplying the camera and personnel'. Careful of this attitude, not because it's entirely negative as we need pioneers in life. However when it is based on other people supplying money/equipment at their expense over your own, it's unlikely to win many supporters when they have no demonstrated return for their cash.
Also, you need to research your audience as your idea is based on concepts that 'I'm sure people will watch'. You say yourself that you'd dip in and out only, but others would watch. What makes them so different to you? If you want to make it work, go for it. Get out there, wrap up your camera, practice, practice some more, see what looks good and then edit it all together to make something interesting and grabbing which you can use to sell, either literally or as an idea, to the tournament organisers and the genera paintball crowd.
I know how frustrating it is having and idea that you think cannot fail, that everyone one will want, that everyone should want. Reality is a little different when it comes to people parting money. Give it a go and see what happens and see what you can make. It might be the live stream is a long term rather than something that is initially achievable. What will be required is a lot of your time, both on field and editing (which I assume you've had some decent experience in otherwise you'll be laughed off YouTube by the armchair critics) and probably some cash.
One thing that might be useful in defining audience: I made a video of the pictures I took at the Southern Masters on the 27th and posted it up here. How many views would you expect this to have? This will be your audience that you are trying to sell to. It's a large tournament with a decent following? What might be more pertinant is how many views you'd like to/expect to get from one of your films/web casts. Guess and then I'll tell you the actual number.