re: Poker & SNG Bankroll Builder Strategy
Your basically talking about a loose version of a 'steps' system.
Most of the poker sites
used to run these, not sure who still do.
I.E. you buy into level 1 - a 9 seat $3 game, 1st and 2nd (often 3rd too) get a ticket to the next level, (maybe a $9 9 seat game), and continue to (usually) level 5 where the buy in would be few hundred and there are some prizes worth winning! Obviously you can buy directly into higher levels or grind from level 1.
I like the sound of what your doing, but not as a long term BRM plan. Sure it'd be a fun way to kill a weekend, maybe make a few dollars and experience different levels, but as mentioned above, you should really be concentrating on one level at a time.
It might be the same game, but its played differently at different levels, as weird as that sounds!
That said, there are still as many fish as sharks at the higher stakes! Best of luck to you, keep us posted as to how high you get on the steps!