RE: It is important! Please vote for witness. Steem-market, rating and uniqueness check.
Many people have tried to build a steem oriented market before but they all failed because they did not think it properly since as you said, it is a matter of finance. I really hope that you will succeed where everyone has failed, especially since the Steem blockchain has an escrow service built in it that you can leverage.
I am looking forward to seeing the evolution of your projects,