I would contact the FHT federation of holistic therapists, the CTHA the complementary therapists association (embody) and ask what they charge and what you get for that. You will need to be insured, these offer insurance options too.
It really depends on what you are practising. Although I am a member of the FHT i also joined the reiki federation as they give me great support in this field. If you are a reflexologist you may want to join the AOR, there are loads associated with many different types of therapies and it would be good to know what you intend to undertake to be able to help. I saw you put massage down, is that sports massage or just holistic massage.
Ask around, I am sure you will get lots of feedback here.
I find the FHT very good and the reiki association as well. Would like to join the AOR but have no need to and it is just more money, when I get all insurance, support from previous groups mentioned, happy hunting!