Check out this thread - https://forums.lineage2.com/topic/18107-budget-build-evis-alt/
His setup is probably ~40b, but a lot of the individual pieces are in your price range. Probably the cheapest start is to get a creation ring, pair that with the Paulina's ring that gives CD. After that weapon is probably the priority, but not sure whether Enh. Shadow is worth it or what other options are good, short of the usual +12 bloody recommendation for people later in the game.