RF wireless link design for long range video streaming

Hello,
We RF wireless link solution as per below specs:

1. Data + Video stream 720p 30FPS
2. Communication range: line of sight, 4KM
3. Data rate ~20Mbps
4. Frequency: 2.4Ghz, 5.8Ghz(optional)
5. MU-MIMO (2X2) antenna configuration, robust against interference, multipath
6. Low latency: <100ms (excludes video encoding / decoding)
7. Solution should be scalable in future in terms of range (up to 10Km)
8. Communication interface with processor: USB, PCIe, SDIO

Deliverables:
1. Block diagram with all parts selections
2. Calculations to justify parts selections
3. Layout review at later stage (Schematic and layout will be done by me)
4. Guidelines for SW on how to address interference

Target BOM cost: <25$ for 10K annual volumes

Please explain your relevant expertise for this project in your proposal.

Thanks.