If they're not talking, they're not acting?
Extras, such as actors or perks for being in the production? We have background extras for cheap this time with the posable stunt dummies. All we have to do is cloth them.
The fact the the script and characters are so interesting is bringing in good people for cheap even in this bad economy. I have a retired fight choreographer and martial arts instructor on board who gave a great audition and willing to work with us because he likes what we are trying to do. And, since he is retired, he has the free time to help.
We will be trying crowd funding soon just for that purpose and our stunt budget. But, we have to be prepared for the fact we may not reach our target.
I like your ideas immensely.Could you shoot alternate takes that you know you're not going to use, but give them the footage? Or if they need something that's actually out there in distribution, could you do a promotional webisode or similar?