It's not worth doing a type rating unless it's linked with an airline who are offering you a job, even then paying for it is pretty crap.
When an airline does a type rating in house, they are teaching you all the SOPs they have that you will use on the line.
If you just buy yourself a type rating, you will be taught generic SOPs, or possibly incorrect SOPs for a different company, which could harm your chance of getting a job with that rating. It's like the MCC course, just generic multi crew SOPs rather than the exact wording or procedures in use at a specific airline.