1) Trot around to the healthy local businesses (banks, etc) and ask them to sponsor a "blank"...concert, wall, etc.
2) Sell memeberships to the public. Memebers get reduced price tickets.
3) Ask construction companies, etc if they can donate or give a helathy discout for materiels.
4) Get a peice of a local artists' work (donated or other)and sell raffle tickets.
5) The biggie for fundraising--Just keep asking!! You have to ask for money, because they are NOT going to just walk up to you and volunteer it.
6) Is the National Endowment for the Arts still in existence?