The most important thing you need to be successful on eBay is your TIME. You need to be able to put time into thinking about your business, getting to know eBay, and researching and testing in order to make the best decisions and spend the money you do have wisely. If you are not willing to put in the time, then you may as well throw your money out the window right now.
Look at it this way. If you wanted to become the best football player in your state, would you expect to be able to do it with just half-an-hours practice a week? Could you become a concert pianist with 10 minutes a day? Or learn Chinese in just a couple of weeks? Of course not! To be good at anything: whether that be sport, music or business requires time and commitment. That means accepting that you will have to sacrifice some of your spare time now, in order to be able to have more spare time and money in the future.