While I see how the WET11 could be used, it seems I would still need an extra hub switch or router. The BEF11' is cheaper than the WET11, and looks more versatile. The plan is to replace one antenna of my gateway configured BEF11' with some LMR400+antenna for LAN A, and duplicate this setup on the far end.

So unless I'm missing something here, I should get the PtP wireless link plus allow local wireless connections at each end too (2nd antenna). What isnt clear is how the two routers should be configured for this setup.

Will 2 BEF11's work as I suggest?