Can I use a Nighthawk M2 as internet input to Orbi Router?

I have a dilemma.  No NBN broadband service available because we live in a retirement village that provides internet via their LAN.  No NBN cabling installed, and not within Fixed Wireless Broadband area. Internet provided degrading rapidly as village fully occupied, and younger residents using internet more. Single IP exit to Telstra copper connection supports about 28mbps on a quiet good day. Drops to 1-3 mbps in evenings. Streaming SBS is literally impossible, while Netflix is still usable some times. Village is looking into an upgrade to fiber to Telstra, but they have been in discussion for a long time, and nothing happening for months. 

Considering use of mobile broadband in the interim, but Wifi will not provide all the connectivity we require. Have Orbi with 2 satellites providing in house connectivity, and would like to continue using it. 

So, the question is, anybody have any experience using a Netgear Nighthawk M2 connected to an Orbi router via Ethernet connector from the Nighthawk to the Orbi Internet input? Any technical reason it will not work?  Assuming it does work, and the Nighthawk is getting 30-50 mbps from the mobile tower, will the connection to the Orbi provide that speed?