You are asking about MCC and CRM - these are two very different courses that have a few similar elements.
MCC is a FCL requirement to get your first multi pilot (MP) typerating. Many airlines want you to have this in order to save costs. You will also need it if you plan to buy your own first MP typerating. It can be taken in any JAA memeberstate - don't think it matters where.
CRM is an OPS requirement specific to each airline. (Must undergo CRM training approved for each airline). This is normally conducted by the airline after employment. Few airlines that I know of will require you to have this to get a job. In other words JAR-OPS CRM is nice to have but not as needed as MCC for a career start.
If concerned about cots than I would skip CRM and focus on MCC.
What should you consider when choosing self sponsored MCC?
1) Cost
2) Transferable concepts
3) MCC philosophy
Cost – the most cost effective MCCs are often conducted in non-type specific FNPTIIs (low cost training device) or old simulators in aircrafts not widely used anymore.
Example of transferable concepts: A course that will use the same FNPT or FFS (simulator) as you will use for your future typerating. Eg. if you are planning to invest in a 737 type than it would be beneficial to follow an MCC course that use a 737 FTD and that will use procedures and profiles similar to those you will use during your later 737 type training.
MCC philosophy - MCC courses tend to be “generic” but are often based on turbopropps while others have been carefully designed to explain multi-crew philosophies used by the major manufacturers of transport category jets. Some schools have decided to include lots of nice to know stuff that is not required to be covered in detail. Others choose to follow JAR-FCL in a practical need-to-know manner.
MCC courses should include 30 hrs classroom and 20 hours FNPTII (SIM)