I believe gooseslayer has you pointed in the right direction. One thing to remember is that GHG shells don't seem to have the paint problems it seems their other stuff has. Adding motion stakes to shells is also a good way to get movement and looks close to a fullbody. If you have been here long, you will probably see that I am a big fan of silos, and also agree on Real geese or Outlaws. They look great and I believe give the illusion of motion to geese. Bigfoots are great, and are super durable. Tons of geese have been killed over them. GHG may look great, but in my experience need a bit of TLC to keep looking good. You may look at them both and decide if the extra care is worth it for the GHG. Of course if money is no object, you may look at DropZones or Dave Smith, but you may have to consult a divorce attorney if your wife sees that bill! If cash is tight, I would spend money on shells and silos before fullbodies. Numbers can be important and you can get a lot more of those than fullbodies.
For a nice late season spread, I would consider at least 3 doz dekes per hunter. We use a bit more than that, but it is a good base. For me and my usual hunting buddy, we usually put out 6-8 doz silos and 2-3 doz shells with at least one doz. on motion stakes. Fullbodies are great, but suck if you need to be mobile. We can't drive onto fields unless they are dry or frozen. Just my .02