Design and develop tactical UAV

I need design and analysis fixed wings UAV with detailed description of the work and procedures to make it.
Design should be for manufacturing with details

-The required UAV must be a small tactical that can carry 50 kg
-The flight duration is not less than 25 hours
-The structure will be made of fiberglass
-The chassis can be made of carbon fiber or aluminum
-The engine will be a 150cc motorcycle engine Or you can suggest an engine
-fuel tanks
-It must be stable in flight, take-off and landing with or without payload
-Suggest suitable landing gear and mechanical equipment
Wingspan: 3 m
Engine type: Motorcycle 150 cc to 250 cc
Length: 2 m
-The fan is behind
The design may be similar to the Bayraktar TB2
-Considering that it is easy to disassemble and reassemble

Please submit the offer in full details.