Welcome @revmiller, very interesting project.
I agree with @nraghuveera, to me it also seems that the primary challenge is finding eligible investors that are willing to provide capital. DeFi liquidity is more of a secondary challenge from my perspective. Sure, investors need to buy and sell their stablecoins in a more or less frictionless way and secondary market liquidity (e.g. on DEXs) helps but there are also other ways to access liquidity.
We are e.g. currently working on a series of liquidity improvements for Mento (Mento is the protocol behind cUSD, cEUR, etc.). For example, the current update allows users to mint/redeem Mento assets with/for Ethereum USDC at minimum slippage. I.e. users have access to deep ‘primary’ liquidity when interacting with Mento, while they can also access Ethereum liquidity at any time by redeeming Mento assets for Ethereum collateral.