The antonyms for "big time operators" can be small business owners, mom-and-pop shops, and independent contractors. These are individuals or small groups who run their own businesses with limited resources, rather than large corporations or conglomerates. They often have a more personalized approach to customer service and tend to focus on creating niche products or services for their community. Unlike big time operators, they do not have the financial power to dominate the market, but they take pride in their work and rely on word-of-mouth referrals. They are essential to the economy and provide unique opportunities for individuals to pursue their passions and make a living.