You're a full-time instructor in a helicopter TRTO but you only have a PPL? So you've already paid not only £5000 for the type ratings but presumably also a substantial amount of money for CPL ground school in order to be an instructor, but you have not done the CPL(H) flying course so you can't be paid?
Could it be that the owner only wants CPLs flying the turbine types? Or am I missing something?
If you haven't done the CPL, why is that? Wouldn't it make more sense to spend a bit of money on a licence which will enable you to earn from your flying rather than on type ratings which will earn you nothing?