I am currently building my round from scratch (100% trad).
I believe that where I am located (Ireland), people assume I am trad anyway, because many customers I have picked up have assumed that they would be supplying water for me to use!
I had looked into the idea of going WFP, but decided that it would cause me too may headaches, one of which would be the outlay, and maintenance costs. I like to keep things simple!
One serious question though. Is there any reason why you couldn't charge the same for trad as you would with WFP?
Best wishes,
John