I would be willing to participate in such a series of leagues, provided we can work out the kinks.
And though I appreciate the confidence and can help, I can't volunteer to be commissioner for the whole shebang. I have child #4 due Dec. 4 and will have quite a few distractions leading up to and after that. I plan to keep participating, just can't be the main driver.
I also am not sure how excited I am about the idea of the bottom three funding the winners' prizes. There is enough incentive to win - we don't need a disincentive in my view. If everyone throws in $10 per league you would have a $600 prize pool for a 5 league tourney. Then come up with a formula for allocating places 1-3 and divide 300/200/100, as suggested. I am fine with giving greater weight to W/L record and maybe less to playoffs. Just need a set formula.
We may need to collect funds up-front to prevent people dropping out. Not dropping out dishonestly, I trust our group, just because real life sometimes requires such changes.