If you're prepared to move into your car, why do you need $30k?
Without rent costs, you could easily live off a few hundred a month, and less than $5k/year. Shower at friends' houses, sponge bath at public restrooms, microwave ramen noodles, make good use of library/mcdonalds wifi + power outlets, etc. I know this, because I've done it.
Unless you plan to spend a 5-6 years in the "sales phase", living solely off of a loan, during which time your original and un-updated software product will become all but worthless, this is a ridiculous request - made all the more ridiculous by how you actually made the request.
As others have suggested, why not just go pick up a 40-hour job flipping burgers while coding on the side? It sounds like it sucks, and it does indeed suck, but you'll feel proud of yourself regardless of your project's success - and, on top of that, you won't be a groveling beggar.
tl;dr - you're doing something WAY wrong if you need $30k for living costs while bootstrapping. You don't even need to live from a car, just pick up a cheap studio thats not too close to a major city.
I mean, damn, I remember when I was able to live fairly comfortably in a 1bedroom apt making less than $15k/year working at Best Buy right out of high school.