I'm afraid (meaning I'd bet serious money on it) that you are severely underestimating how much list it will take to get into 101.
You'll have zero chance to get near top 300 with 500 000.
There are 100,000,000 and 101 delegate spots. A lot of the LISK will be on the exchanges and a lot of people will not vote. Also needing to expand to 15 people is a possibilty. Lastly, some people will have more than 50,000 (like myself
![Smiley](https://bitcointalk.org/Smileys/default/smiley.gif)
)
And I think only 85,000,000 will be available at launch