You really need to read my post 20 and understand it.
You can do a lot better with less money and effort. You really do not have a plan that makes sense. One good sub always beats a bunch or poorer ones.
As I pointed out in post 20 this plan of yours will not even reach as deep as my center channel.
You are making an common elementary error in thinking that a lot of 12" drivers will produce deep bass. Well if you add 100 subs they will not reach deeper then one of them, just play louder.
If this is a music system it will do fine for most music, even so there are lot easier ways of reaching that goal. If it is deep movie effects from the LFE channel you are looking for this plan will NOT get you there.