Starting a new museum can be rewarding, but is not without challenges.  Below are links to resources that may be helpful.

• Starting a New Museum from the American Alliance of Museums
  And this document.
• Grant Source: Eight Pieces of Advice for Nonprofit Start-ups
• Building Museums: A Handbook for Small and Midsize Organizations
• Center for the Future of Museums: Vetting Future Museums
• Start-Up Success Isn't Enough to Found a Museum

Also check out these other resources for more expertise related to museums.