Can you realistically be a CFI with an add-on rating?
Most places will offer a CPL(H) add-on rating requiring 50 hours helicopter, and from there it's possible to get a CFI add-on as well. There are plenty of non-Robinson options - Enstrom, Bell 47, G2, Schweizer/Hughes etc - but will any school actually hire a CFI with only 60 hours helicopter time, or is it all in the hands of insurance companies?