Cloud computing became one of the most important platform for the cloud providers in order to install the cloud providers in the virtual manner via Internet to the customer. Cloud customer all over the world exchange their data with high range of computing resources, secondary level of data storage with high bandwidth. Hence the ongoing demand for demand for the scalable resources is very popularly increasing between the cloud customers. Therefore single cloud server could not able to detect and connect with high range of capacity to the application during run time. Hence the researchers are in need to build virtual lab environment for connecting the multiple cloud server thus advancement research leads to the collaborative cloud computing (CCC). This paper utilizes an efficient resource sharing platform called Harmony and then uses the Neural Networks (NN) for appropriate resource selection. Further the trust management is implemented and optimal time period for resource selection is optimized.