I bought an American Car Dolly to tow my Toyota Prius with. They are made in Colorado and the owner delivers it to you anywhere in the lower 48 states. They have electric brakes and an available brake controller that attaches to the dolly that are activated with the brake lights of the coach. The ramps are removable rather than attached to the dolly. Mine has worked great so far. I paid about $1600 for mine delivered to my house with the EZ brake controller and a spare tire and wheel. You can see them at www.americancardolly.com.
Dan