User blog comment:Plantmageskelly/Project Jewel: Ring Suzune Send-Off/@comment-90.213.172.78-20140926212441/@comment-3076833-20140926215005

"Plus, again 600 is probably near the amout to make a Vocaloid"

Add about 2 more 0's on the end of that and you'd be much closer. To put it this way, while we haven't had official confirmation on how much money is needed we know that for Tohoku Zunko to become a Vocaloid she needed to be crowdfunded for 4.5 million yen (Which roughly translates to $41,183), this being the MINIMUM for her to be produced.