Only problem with that is the extra time to split the coins after each run. Have a few ppl lot eall coins 100's and Wootz ores and then sell them durring the course of the month. Split the gil @ the end of the month. It takes about 5M/month to fully fund dynamis. A decent dynamis shell can make triple+ than that. I belive our dynamis shell normally makes 20M+ a month if we don't do tons of Dreamland runs.
You can fully fund your dynamis LS and still make good gil to give to your members. Just make sure to take the operation costs out of each months bank before payouts.