My sisters family spent about the same for their travel trailer and new truck as we did for our 3011 DSF but yeah, a C is much harder to sell until it's older and prices in around the cost of a new trailer. We opted for the C because I didn't need a truck and didn't want to pay the gas to commute in it daily. Ease of travel with the kids, quick setup and the option not to flat tow a vehicle on short trips made the decision easy for us but I know that this C will be with us for a long time and all of that ease of use will cost me more $$$ in the long run. If I had it to do over again though, I would take a harder look at the shorter A's with the drop down bunks. The floor plan is more open, the mileage is about the same and there are fewer seals and seams to leak on the front of the rig. Some believe that a C is safer and easier to drive. While the C is crash tested for the up front riders, the kids are in back so for my family the argument that a C can be more crash worthy is moot. There is the appearance from the cab that the C is smaller and easier to drive but the reality is that the back is just as wide and the mirrors stick out just as far. The C also has a larger turning radius than an A of the same or slightly larger size because A's wheels can turn up to 60 degrees.
Oh, don't forget about insurance on the C as well. Incidentals like that are easy to overlook.