Lol, no one knows the answer to this question and if they did then they probably wouldn’t tell you.
It’s much more fulfilling to narrow your interests and start buying cards you actually enjoy. What’s your favourite pokemon? Favorite set? Favorite promos? Find out what you enjoy and check their prices to see if they fit your budget.
If you really don’t want to do that, then there is a little contest happening here on e4. Check out this thread for ideas.