You need to provide more information!
1. What are the specification of the MH you're planning to pull the dolly with?
2. Have you checked with the dolly manufacturer to see if the dolly can handle the Mazada properly?
3. Does the dolly have a braking system?
4. Is the hitch on the MH strong enough to handle the dolly and toad?
Even though I've pulled my Vibe on a dolly for over 10 years and 50,000 mile I'll agree with jerseyjim that 4 down is better but it's getting harder to find toads that can be pulled 4 down and can you afford changing toads?
Dave