i think you should get all the ratings you can,cos you never know when you will be useful, I got a lot of 206 time doing engineering flights, cos the engineers attitude was that if you had the rating you were legal.
also as far as instructing goes most likely place you will get it is wher you did your instructor course, I did more than 1000 hours flight instruction at the place I did my course, and that started with the CFI saying i could only do the odd trial lesson every now and then ( from small acorns mighty oaks yada yada yada)
unforunately it is a very cynical business, people will always tell you you have the wrong experience when it suits them but anything goes if they need you, i have seen people being sent off in a 206 cross country by someone who wouldnt let them start it themselves, because they didnt trust them not to overtemp it, but they did trust them to fly it apparently.
lately people have been telling me I have too much IFR time, they used to say I didnt have an instrument rating. apparently I cant navigate anymore visually, they never said that when I was flying robinsons.
in some ways the heli business is fun in a lot of others it is !!!!!e