That would be rewrite 10+. I stopped counting after 10. I've done a lot of work to refine the script and make every scene mean something. I've also made the script in so many variations with the end result different each time.
The last rewrite that I did though was the one where I knew I was on the right track. The original 1st draft script went from a "Mahogany" type story to more of a "Leaving Las Vegas" feel. I'm sure you can imagine how many scripts were in between. Everytime you rework a script, you usually find new elements that you could never have seen in the first draft. I know once I'm done with this rewrite, I will be tweaking until we shoot but this is the complete story now. I don't feel like I'm missing something, I just feel 100% confident in what I have. I never felt like that before with this project.
Good luck at MA. As an actress I always had a lot of respect for the writers but since I started writing my own projects, that respect has grown 10-fold. People mistake the director as being the heart of a good film but they're wrong. Any great film starts with the script. There are plenty of great directors but if the script is awful, there is nothing anyone can do (director, actors, or even special effects) to salvage the film (ie. Jurassic Park II).
Keep track of what's going on and tell your friends. The more support I get helps the momentum. And if you've ever worked on an independent set before, you know all you have to lean on are the people helping you.