Brent (Since Brent was the only one to respond in a sensible manner),
My limited (very limited) knowledge of US golf tells me that the UK model would cause all sorts of complaints. Really, that's the gist of my point. Unless the attitude of the average American golfer can be tweaked, seemingly you're stuck with an unsustainable model which is fine in boom times and a recipe for rust in the bad times.
Now, genuinely, I'd be interested to learn why you simply can't have carts, hired trolleys, golfer's own trolleys and walkers all coexisting happily. You pay an annual membership fee and thereafter, should you wish to hire something on the day, you do so. Rounds take much the same amount of time regardless of mode of transport and quicker players are called through by slower players anyway. It ain't rocket science.