I need help trying to get the best airbrush kit for cakes... I want to invest in a good one so that I can do all projects for cakes large or small.

Because I've never owned one before I'm not sure what to look for.
What's better, what PSI works better with cakes, the airbrush units with the best reputation amongst the professionals, as well as the airbrush itself...etc.

Even if someone could tell me which ones not to get would be a starting point.
Im doing a cake in May that requires me to airbrush the whole cake in gold. (6 Tiers)

Help!!!!
Platinum Weddings

i am watching this as i posted a similar topic a cple weeks ago and no one has posted on it. all i know is that a double action is easier to control as my partner has an airbrush(hobby) but i have noticed some "cake decorating" airbrushes are single action which confuses me.
iwata, paasche and badger are all good brands that i have heard of.
i wish you luck!