Big Jump - From Party $100NL to $1000NL??

[AgileMike]

Need some advice here. I've been beating the Party NL100 game for about $35/100 for over 30K hands. I want to move up, but it seems like the 200/400/600 games have much lower average pots than I'm used to seeing (appx 25% of buyin). The NL1000 game is the only one that's running pot averages at 50% of buyin. I have two questions:

1. Is the NL1000 game significantly harder than the NL100 game?

2. Is a 30K bankroll enough to play the NL1000 gamne?

Thanks in advance for the help.