Donors' contributions to a 501(c)(3) organization are tax-deductible only if the contribution is for the use of the 501(c)(3) organization, and that the 501(c)(3) organization is not merely serving as an agent or conduit of a foreign charitable organization.
Expect ~$1,000 USD per exam for the exam fees and the CFA Institute books. Most people will also use a third-party self-study packages, which include practice exams, condensed books (the CFA ones are 2x+ longer), study tips, online question banks, etc. Factor in an additional $500-1,000 USD per exam for these. Schweser is the most popular study package: http://www.schweser.com/cfa/. No matter how diligent you think you are, most people I know took an additional 5-10 days holiday in the run-up to the exam.
CFA vs. MBA. The commitment to pursue the CFA cannot be understated. According to the CFA Institute, the following is the amount of time needed to obtain the CFA designation: Four years, on average, to complete the program; Six months of preparation for each exam; Over 300 hours of study time