Thank you , these are all good points. The concept of the Macerator on the outlet is one that I considered. I watched this video and decided that it may not be all it is "crapped" up to be.
So I began to think that if I were to put a "true" Macerating toilet in the place of the standard toilet the tank would have a slurry in it and be much easier to dump.
So from the information presented here it appears that there are some serious flaws in my thinking. I am a rookie, looking to get into a fith wheel soon.
Any futher ideas or comments would be welcomed.