anon,
Population and Size of the city: every other major city, including Perth, Brisbane, Hobart, asnd all other reigonal centres outsied of SA use an association model.
Why it that a problem?
Club Administration and availability of quality administrators: by moving to Association, clubs will need to employ people outside of basketball with sports industy service skills, to go with the clubs basketball understanding. This can only improve the product and therefore the sport.
Why doesn't your club have these people already?
Lack of facilities: Associations in Melbourne play without owning any facilities at all. Go and rent some, talk to coucil about building some. With income from current competitions, you can even get a loan to build yourself.
Lack of Coaches: This will develop as playing numbers increase.
Lack of referee's: This will develop as associations will need to employ and improve them to improve their competitions. Hence, it will mean that if clubs don't put effort into this, they will lose out on their own growth, a very good reason to do it.
Tiny playing base: Sa doesn't have a tiny playing base, it's just that it is spread over multiple competitions. association will put them all into local comps together.
Give me some more.
While you are whinning about why it won't work. Some clubs will be making it work, and in 10 years time your club will be gone, and you will be blaming the change. It won't be because of the change, but rather, because people like you won't embrase change, put in the necessary work, make the sacrifices and imporve basketball.