how much will i need for this ?

Vienna is an amazing place. I've only read about it and the many famous artist who came from there. I image there isn't another place on Earth like it.

How long are you going to be studying there?

I have no idea how much it will cost you, but what I can suggest to you is to look at Art Grants. I know they're grants available for artists for the purpose of travel. They are often offered by local, regional, and even national art organizations or art councils. The larger the council, the greater sum of money can be given. Tip-Alway apply for the full amount.

Art organizations exist for the purpose of helping artists achieve projects, including travel to study. Joining a membership with there organization will increase your odds of receiving monies, but it isn't necessary. I joined a local council for only $35 and it has been worth while because of discounts on art supplies and printing costs, at local businesses.

Oh,...Look into churches and Charities too. Even if you aren't spiritual, Churches are a great source of kindness. Exchange a spiritual themed painting for stay at a hostel or for free food. I imagine there is a lot of history reguarding churches and spirituality in Vienna too.

Well, it was nice talking,...All the best.