Most time the success of business does not mostly come from how huge the capital is, we have seen business that start with hug capital not getting to success, but any all the best in you project and waiting for feedback from those that have tried the site out.
But it is a gambling business, not a business in general where you can start with small capital. In this gambling industry, a big bankroll is like a must so it can attract many users starting from small users to whales. If a gambling site has no good capital to start, how they can a gambling site expect to get many users? A gambling site needs to spend much money for some expenses (not only for bankroll) in order to be a success site. Indeed, huge capital is not a guarantee to success but a success is depending on how the owner manage the site but at least an owner of gambling site who has huge capital will be easier to manage the site.