Bundle only when responsibilities, acceptance and fees remain visible. A combined proposal can reduce coordination, but it can also obscure whether the owner is buying a service regardless of sales success.
Use a two-part statement of work. Part one is a capped discovery/sample assignment: inventory, exclusions, provenance, representative sample and buyer acceptance test. Part two proceeds only after permission and demand gates are met. Require portable outputs so a failed commercial route does not strand the owner with unusable enrichment work.
For sensitive content, separate the data engineer's de-identification test from counsel's decision about permission. Tonic Textual advertises redaction and synthetic replacement for unstructured data; that capability is not proof that a particular archive can be licensed. Tonic Textual de-identification