Having CAD -> bitCAD is a bridge's work. Gateways are doing like CAD -> GATECAD (UIA)
Similar to bitKRW, bitCAD has a low supply, so that if you choose bitCAD your operation will be quite limited.
My quick tip is, find market maker for GATECAD.
Create a new UIA to make it work? Why not just make the market for bitCAD? Isn't that what its for?
I'm sure if the guys serious... a dev delegate can work on the backend and help code it up.
No business comes without risk so I believe its best to spend a large portion of the startup cost in buying some BTS to help on the bid side of bitCAD, buy some bitCAD and fill the ASK side... so that when customers come they will have a functional system (and ramp up based on gateway fees, adding more depth on bitCAD over time)... the risk here is that the market maker is fully invested in bitCAD at this point, but thats what a market maker does.
Creating a GATEWAYCAD defeats the purpose I believe of the peg system as the novelty lies in being able to transfer "CAD to the blockchain", that is the sticky that is going to be marketed and help bring customers in for remittance or whatever... this way bitCAD becomes analogous to CAD and easy to understand (it is that in reality) and will be easy to understand rather than some random UIA that customers wont jump into.