So after having time to look at it I looked at my fat bike rims and tubes. My Fatboy rim weighs ~887.5g average between the two, and the Surly inner tube weighs 300g. If I were to rebuild the rims around the Fatback Big Su and add *enough* sealant for the tires (for me) It would be 640g + 160g with 150ml of sealant. The weight difference would then be 397.5g for a wheel, or 795g for both wheels (~1.75lbs weight savings).
The reason why I wanted to focus on the wheels is, well I added the dropper post and sus. fork to make my fat bike a better trail MTB. The bars are a comfort thing, however the tires and the rotational weight are the things that I really wanted to target. The main thing I was concerned with was seeing how much rotational weight could I shed, and how much weight would be significant enough to warrant the money required to make the tires lighter?