OK first off if the bus is in Victorville I can assure you that loading it shouldn't be a problem.
Many many dump trucks and heavy equipment running around that area. Wouldn't take much to build a ramp to back a drop deck too.
Worst case scenario hire a Landoll to come to the bus and load it onto the drop deck.
Then if no ramp available @ destination do the same.
Don't give up on Uship you'll get more replies! Many trucks are on there way to CA right now for Mon AM deliveries. About the middle toward the end of the week the drivers will start getting restless and be willing to haul just about anything to get headed home! (I've been there done that!)
And I suspect you'll find someone to haul it for you for $2000-$2700 like you want.
And as Clifford and others say a Landoll is the best way but also more expensive too!
I would also check around and see if there is a local company in the area your bringing it too that will give you a reasonable rate. They like to have "guaranteed" back hauls!