If you know how to code and make everything by yourself that budget could be enough to get you started and you will be able to create your own casino, there is just one big problem and that is your bankroll, there are very specific formulas to calculate your risk of bankruptcy, even if you have the house edge on your side if you allow the gamblers that play in your casino to bet too much the chances you go bankrupt are of 100%, and 25k is nowhere near enough to have as the bankroll of your own casino.