API for unstructured data and metadata

A NGO in requires a system that can enable them to catalogue data that they collect during research trips. The data is either related to plants (metadata about certain plants) and cultural practices of any groups they encounter. All data usually has at least one type of media file linked/related to it, e.g there can be a video and photographs of a plant with describing information about what the plant can be used for. In summary, the organization requires a RESTFUL API developed in PHP with the data stored in an appropriate Database (preferably a document database as most of the data is unstructured and horizontal scalability is a must) Extra information. The following information should give a clearer picture of what the API should be capable of as a minimum: 1. Many users can log in to have access on the system 2. Each user can create a project 3. Each project can have many trips, sponsors and written reports related to it 4. Each trip has a specific location/locations related to it 5. Several media is captured per trip, this media can include videos up to an hour long each,many images and audio clips 6. There is a possibility that articles, research papers etc. can be written using the information from each trip or interview therefore, these papers must be linked to a trip The payrate is 25-50USD per hour. Please send message with estimate of how long it will take to develop such a system and hourly Separate quotations for each phase are preferred. Please indicate cost of each phase. The 3 phases are: a) Design/Documentation for whole system b) Database development and modelling c) REST API implementation and Testing