I didn't ask about not being connected to a 141/142 operator, but I guess it depends on what you're delivering. You can only deliver training on endorsements that you hold, and not deliver RPPL or PPL training.
It's not particularly difficult to delivery training and sign off on CSU/retract, but I do wonder about aerobatics etc.
I also wonder about who then is responsible for training records etc and will the endorser have to retain records for 7 years (as you need to as a RTO) and who then is fit to ensure competency if your not attached to a 141/142 operator.
I guess time will tell