Front Wheel Drive on a Dolly offers you a lot of choices. As a group, FWD has the highest % chance of being towable on a dolly. Just watch out for the exceptions.
If you're considering towing something like a minivan, be sure the dolly can accommodate its width.
I've been told that a dolly is easier on the vehicle being transported than if it were towed four down, flat, FROG, or whatever not using a dolly's called.
Some dollies are better than others, of course.
Get one with its own brakes.