Finding a customer who can overpay is a golden moment. They exist in many places, you just need to connect with a boutique product or service;
Big Pharma, if you find one that needs hand carved chess sets you can do ok.
Nursing homes and similar, cash flow is substantial
Investment banking, they are in the business of printing money, but it flows in and out like an unpredictable tide
Defense industry, huge budget with limited oversite