If you're already a profiting SNG player and now want to move up the limits, a great way to do this is to be staked. This means the appropriate bankroll is provided for you in exchange for a cut of the profits. Strategic Poker Investments (SPI) offers a great online poker staking service, which offers a professional process for the investor and player alike. They also offer poker staking management for poker investors who have already staked.
If you're wanting to find out more, check out the online poker staking that SPI offers today.