Had one dolly and decided to switch to four down....no regrets.
If I was to ever get another dolly, it would have to have surge brakes and ramps that are not steep. Today's lower cars need ramps with less slope so the front lower fascia doesn't drag on the ramp when loading.
Agree with the post who suggests pulling the dolly you are considering around by hand to see how hard that might be. You will get into places where you need to unload the car, park the coach and have to move the dolly around to store it out of the way.
