Essential UAV building expertise for the hardware assembly was
necessary,which may require assistance by a professional. Themodular
UAV design allows adding or replacing quadrocopter components as a
user requests, for example, camera mount and wireless data signal
transmission. This is particularly helpful in optimizing the design for
practical uses in civil engineering applications. The total hardware cost
is estimated to a fewthousand dollars (about $8000), thus offering a potentially
attractive investment-return opportunity for a user.