clouddog, you're firing off all these question. You just need to slow down.
First off, I am no even an expert on theatrical plays, nor screen writing, nor drama. I've worked backstage for shows, but nothing upfront.
I would bet that for anyone with a play outside of a theater department or organization or college department trying to pitch an idea for one, is going to be (near) impossible. (I'd leave out the near if I actually knew)
I've heard of college theater departments debating over plays within their high sect (the highest members, seniors of the department with 100 credit hours (doctorates in drama) and everything going for them) and still having difficulty pulling it off. And, it's not a one man show. It's everyone's play, not just a single person's by the end of it.
And further from that, they put it on for their own sake, not for any profit.
EDT: I'm also going to guess that you have not or are not in college or any other program that would couple you to anyone in the theater field, because you're asking these questions. I'd think that would be number one priority, to simply get taught by a professional.
If I was you, I'd look at writing fiction (as in a novel) and bringing out that craft to get your story out. There's still a 1/1,000,000 chance of getting it published (100% of that being actually finishing it), but you've got more chances.
When I had a story bundled up and wanting to give it to someone, I chose the most viable alternative and that was novel writing.
And, work on your writing. Even in your posts, you have grammar and punctuation mistakes.
But, this is just my severely uneducated thoughts.
It's good to hear you're going to be connecting with professionals, because it does seem like you don't understand the world you're aiming for (I don't mean that as an insult-- we all have to learn when we're starting out!). Theatre producers aren't like agents, going through piles of submissions by unknowns and looking for gold. To get a production even by a small professional theatre company you have to have a solid background and solid connections. There's often festivals of short new plays, and some of them allow anyone to submit, but that's only a first step. Going on from a one-night one-hour production to a full run of a full-length play is very, very hard. If your short work is top-notch and impresses people you might get chances for fellowships and mentoring etc., and these help you learn as well as help you meet people, then if you're lucky and talented at some point maybe a director at a smallish place will take a chance on your play. Then if it is well-recieved and does well, you'll get more chances, etc. You have to start small and work your way up. You're never ever going to get a chance of a full-length run at a medium to large venue without a strong track record.
If you've gone through an absolute top playwriting program, like that at Yale, obviously you're at an advantage because a)just getting into that shows you're extremely talented and b)you'll be connected with the top of the theatre world from the get-go, but you still have to prove the hell out of your work through multiple well-recieved shows. And often just luck, meeting the right people at the right time and making the right impression.
In novel-writing there is the tiny tiny chance you can go from unknown to crazy bestseller; in play-writing you will never go from unknown to six-week Broadway run.
So-- work on your writing. Connect with theatre professionals. Lots of them. Get your work produced on small scales. Get a solid production record. Look for festivals. Get into that world. Work with that world. Know it. And work on your writing some more.
I'm a little disturbed that at least one of the posters here (and possibly two, I need to reread one of the posts) discouraged the OP from pursuing the type of writing he wants to pursue in favor of the novel. Yes it is more difficult to get an original play in the hands of producers and theaters, but not impossible. Most producers/community theater directors/college instructors/HS drama teachers read several scripts a year (sometimes in the hundreds) looking for the "right play" for their company or group of actors.
My advice would echo similar advice above, write what you want to write, then shop it around to community theaters, network, talk to people, be proactive in your theater community and the theater community on-line, enter contests, there are lots of 10-minute play contests out there. Write new stuff for those contests. Network with other playwrights and playwright groups on Twitter. Write, write, write. Write what YOU want to write not what others think you should write, but be prepared to work.