Taronga could scrap the new sky rail project and import everything we wished for and still have money to spend. Imports are not as costly as some of these projects that are costing upwards of 70 mil to undertake. The eco resort also costed 64 million, the new teaching vet hospital is 80 million to build. While yes they use it for the animals and wildlife. There is a very large element of using it to teach and create an income from it. And this is only examples from Taronga. Not to mention all the money put into the office hours of planning etc that are not quoted in those costs which are also significant.
If you add up all the costs of projects for non animal related expansions and how much space they are dedicated. Especially if they are able to produce income of their own throughout the majour zoos. Money is not a factor, the issue is the zoo's are being run by corporate executives who are more interested in development of non animal areas into there own income makers under the guise of doing it for 'education' or 'accomodation experiances' or food and entertainment. While maintaining the minimum amount of a species they can while operating under the guise of being a zoo. They simply dont care to import new species or new genetics until it is absolutely necessary, even better if they can do a quiet replacement for an already common species IE sheep and camels taking up space at Taronga, Dingoes ate Melbourne etc.