How to get list of all particular node props/values and out-relations names in DQL using flexible schema?

My use case is next:
Given Linked data RDF knowledge base with multiple contributors (each fact has creator id in facet) we need to render node widget with all added props/values + aggregation info (array.length) about out-relations.
Some nodes might have one or more graph.type , but it doesn’t give us full list of potential props. Assume it is a case when schema plays minimal role (mostly for known predicates)

Also is any way to get all dgraph db triples with facets (to use later as DQL set operation to restore db) using cloud instance($9.99/month one)?

is it also possible to schedule 1-hour live consultation with someone who knows Dgraph in all details, and how much it might cost?