I need a professionnal network design & troubleshoot

Description of support work: You will have to build a secure network including OSPF and QoS based on provided requirements.
You can start from already done ( we will provide current router configurations from our test environment ) or just start from scratch . But you must respect imposed addressing network plan.
Extra notes: The network must be created in a virtual environnement (like GNS3) for testing purpose.
The diagram shows three mobile which are about 8km away from each other, but the entire network will be composed with x*FCU (D1+D2) (with 8 < x < 14)

MV must communicate with D1 and D2 through UHF and WiFi.
D1 and D2 are interconnected by ethernet 10/100Mb cable with repeaters.

The idea of ​​routing consists of operation as follows:
- High flow rates of D1 and D2 pass through WIFI to MV
- Flow control / control (vital flow) pass through the UHF and WIFI if UHF is defective but they must always be passed from both sides D1 and D2.

Additional subtlety if WIFI and UHF links are down on D1 or D2, it must pass through D2 or D1 (the one that is still accessible from MV)
MV must always have at minimum a link with D1 and D2 and have the ability to repatriate , at minimum , the critical flow of D1 and D2.