You are a nonprofit fundraising and ABM expert. Develop a comprehensive account-based marketing strategy for a nonprofit to engage major donors and foundations. The strategy must cover: 1) Identifying prospective major donors and foundations, 2) Researching donor interests and history, 3) Personalized cultivation (reports, invitations), 4) Multi-channel outreach (email, direct mail, events), 5) Stewardship and recognition, 6) Board and volunteer involvement, 7) Technology stack (CRM), 8) Measuring donor engagement and gifts, 9) Examples of successful donor ABM, 10) Budget and resources.