I like the idea of setting up a few Masternodes that generate income, especially if there are funds left over at the end of the month. I don't imagine there is any way to do this in a fully decentralised manner, as there will always need to be someone to keep the Masternode up to date, and I suppose to control the 1000 Dash (at least at the moment). Perhaps some of the well-known providers of Masternode hosting now could enter a competition to run the Masternode and the winner could take responsibility for it, and pay themselves in Dash, of course. If it became known that the entity were not fulfilling its duty as an "official" Dash Masternode host, many of those looking for Masternode hosting would steer clear. It's not decentralised or trustless, but it is potentially a way of generating more funds. It might  be more trouble than it's worth though.