I know this sounds quite callous but if I were in your shoes Id test run some normal gouldians for at least a year before spending up on blues , WHY ? well because then you can see if your aviary is situated correctly and draught proof enough to keep them alive also it gives you experience with them that will be needed for the more chellenging mutations .
As much as losing any bird is a heartache losing big dollar birds could mean the end of your hobby ..of course this is only my opoinion and based on my bird budget.
You kinda have to crawl before you can walk ...of course if you go ahead with the blues I wish you all the luck in the world and hope you do well
