At the center of these recommendations is a 9-12 hour journey limit for horses (in keeping with the view of the European Commission's own scientific advisors), which is perfectly feasible given the abundance of slaughterhouses licenced to take horses, and would actually save money and red tape by harmonising with other laws.
It's tough advice because it involves red tape, but it might save your donors and bidders a lot of trouble later: As you gather donations, assign fair values to every item.