eve all skills

i use evemon and self programming to plan the skills.
it now take 1500 days (about to 2013 AD April) to learn the all skill(360+ skills, i now have 150+, still to make 570+ training level steps), but not all to the highest.
it seems to level learning skills up to all 5 can cut 150+ days than at level 3,4.
and it will cost me 30 billion isk to buy only the skill books.