Sounds like more trouble than it's worth.

A flat bed motorcycle trailer has worked very well for me.

http://andersontrailers.com/index.php/tilt-trailers/81-mt-motorcycle-series

This was a simple mod that entailed drilling four bolt holes to move the wheel chocks so that the M3W fits. The ramp unfolds and you just drive up. The front skirt is invaluable to keep debris from hitting the car.

I secure the front to the supplied tie down hooks and run a strap through the rear wheel so it doesn't slide about.

I also use it for working on the car as my back appreciates the added height!

What's your mileage? Who cares. Is it practical? See #1. What happens when it rains? You get wet.