Not knocking the workmanship of locally produced racks, though its apples and oranges when comparing them to the international gear. I have no problems justifying the money I have spent on my Vison and Freedom Breeder racks, design and materials wise nothing else compares, seriously. Even if you were to focus on the tub quality alone, both use plastics superior to the off the shelf bunnings or k-mart jobs, they hold up almost perfectly in comparison to even my 7lt systemas of the same age that have urate scarring and discolouration....
Its all about keeping within your means... the majority of my collection is antaresia, and even though I have the skill-set, and access to just about all high-spec trades, C&C cutting, my Mrs father a Navy certified boilermaker, just about anything and everything necessary.... I still cant justify the time and expense to produce a rack, that would be out performed by an off the shelf set-up.