I cant comment on the difficulty of the synthesis itself, the real problem is that all of the precursors are highly regulated. "Lysergic acid and lysergic acid amide, LSD precursors, are both classified in Schedule III of the Controlled Substances Act. Ergotamine tartrate, a precursor to lysergic acid, is regulated under the Chemical Diversion and Trafficking Act" -wiki
I believe there's an article on erowid about converting LSA to LSD but they concluded that it was not worth the time or effort as the yield was extremely low. Bluelight does not allow questions regarding synthesis so I'd say this is going to be closed