My previous thoughts of getting a tow dolly for 1500 bucks were only partially accurate. It is, indeed, possible. However, such a dolly is not rated for the 6000 lbs that will be towed (Dodge Durango is not a small vehicle). We do believe that we can tow the Durango "4 wheels down" provided we get a towbar (about a thousand dollars), and this looked excellent until we realized that we would need a braking system, which is considerably more.
So, for now, we are going to drive the Durango up to the SF bay area for the next month's meetings and pray for the funds to buy a towbar and brake system. We will leave the motorcycle in San Dimas to be sold as partial funding, but we will need another 1500 to pay for the brake system. We will update as we have more information!
As always, thanks for your prayers!