If integrity is a sign of immaturity, then I shall remain immature.
That said, you will have to make comprimises if you want to maintain your integrity. You will have to save up for those rainy days, because they will hit you harder. You may have to settle for contract work or the so called 'survival' jobs. Working for yourself may even be viable, if you have the ability to attract clients. And attracting clients, not building a fancy laboratory, is the issue. (You can secure loans, deal with an inadequately equipment to start out, or work a bit outside of your field.)
I'm guessing that your history is more of an issue. You probably don't have many contacts inside of your industry, and it seems like that is the only reliable way to find a job. The lack of prior work experience may also be an issue (I was working for my university from the first summer onwards, and even that seems inadequate).