James, I know the feeling! These cars drive real well and carry a good bit of focus heritage with them. The fact they were stepping stones for the RS and showed what the platform was capable of.
Regarding the sleeper idea it's always appealed to me, but at the same time I'd feel like I was destroying so much of what the car was built for. It's a hard decision and to be honest I now love the look of them Whichever way you go with it, good luck buddy and hope the business venture goes well