Fork OPM and mint a bunch of stable coins in advance. This will be the maximum number of coins in circulation and will effectively act as a debt ceiling. This is pretty much a replica of compounds code with some UI changes and would allow us to go to market fairly quickly. We are working on this at present, and will be using xBTC (BTC wrapped to XDAI using pNetwork) as collateral as our first asset. Once we know the system is behaving as expected we can mint some more tokens to increase the debt ceiling. This is a quick and dirty model to get to the market fast. We intend to do all our experimentation on XDAI first in light of the ongoing gas issues with Ethereum. Other assets can be added as collateral in quick succession.