Assuming that you get an average of 2000 SP/hour, your net generated SPs are 1,440,000 SP this would yield just shy of 3 Injectors per character; however with +5 Set and correct mapping of attributes you can get around 2400 SP/hour, so this would net you 3.45 Skill injectors (or 1,728,000 SP).
Skill Extractor is ~416m ISK and Skill Injector sells for about 856m:
Lower bound Profit margin: 2.88 x (856 - 416) = 1,267,200,000 ISK (average)
Higher bound Profit margin: 3.45 x (856 - 416) = 1,518,000,000 ISK (average)
with PLEX prices being around 3.6m ISK; it will cost around 1.85bn ISK á month to keep Omega status, and an additional 1.63bn ISK for each MTC (Multiple Pilot Training Certificate) you need.