Which chip & how many needed: ZigBee and Bt comm box

Please ignore Product Type I selected  - i set it to just select that to something.

I'm planning/designing a comm box, which needs to speak to ZigBee based nodes/sensors, and also nodes/chips with Bluetooth.  Further, I want then that same comm box to forward data from ZigBee and Bt  nodes it oversears on another  interface, likely also Bt, but used as direct to a client connected to this comm box .  (It could possibly be over WiFi too ).

My question is, how many ZigBee and Bt  modules do I need here, to effectively and simultaneously be able to collect data from these nodes or slave devices to this comm box, and forwarding it to the comm box client? 

Do I need  1 ZigBee,  and 2 Bt modules ?  Or 1 ZigBee-dash-Bt combo module  + 1 Bt?   The comm with nodes (or slaves) that my comm box will oversee shall not interfer or be independent of what it forwards  / sends to it's client. But also not to over-chip or make this costs reasonable.

Advice here is highly appreciated, this would be my first work with this technology.

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