Is a StrataManager Compulsory?

Hello,

Do we need to employ a Strata Manager, or can we chose to manage the property ourselves? (Committee and Resident Manager, with possibly help from an accountant)

Alternately, if we chose to change our Strata Manager, can the Committee do this or is it a AGM decision?

How do we select a new Strata Manager? (avoid the white shoe exec presentation where they promise the world)

Thanks,

Ken