This is kind of close to my heart, because I've always wanted to make an indie zombie movie. In fact, I bought a Canon XL1s a while back plus a tripod, and I have some good gear for film projects, but I've always been hampered by the lack of enthusiasm from my friends (WASTES OF SPACE!!). So if my neck was in your woods, I would be interested in helping you out, but obviously I am a squillion miles away in the UK, so cannot.
But onto the money thing. I think you may be going about this the wrong way. What you really need is good actors and a good writer. There are so many crappy indi films out there. People knock them together all the time. You can get posh equipment to make it look better, do some good after effects and maybe get some good audio in there, but it'll still completely suck unless you've found talented people to work on it.
Imo, the way to do it is find the people, write the script and film it on a low budget with a rubbish camera. If the actors and script are strong, it'll be a good movie, even with rubbish equipment. At that point, you can approach people with a good product that needs polishing, and then people will be much more willing to help you out financially.
If you don't prove yourself first, people will assume you fall into the 99% of indi movie makers who make crap, and won't be willing to part with any of their hard earned casheesh.
Hope that helps.