There is a difference between is what you are getting a good deal, is it enough and ultimately if done right, is solar something you would be willing pay for to get a need filled.
For us it is priceless to be able to be out in the middle of no where and camp comfortably without worrying about the batteries, listen to a generator or use the trailer like a tent. It's our rolling cabin and we use everything but the roof top air. We do have five times as solar as you are looking at and have yet to spend as much, but it gives you a idea of what can be done.
So what were you planning on using the solar for?