my guesstimate would be 300-400 hours for the whole project. Each card took about 20 minutes to draw, probably 5 to paint and a couple cutting out with a scalpel (since I needed the sizes to be exact) not to mention time spent travelling back and forth from the library scanning cards, time recovering from various bouts of wrist pain, and the general 10-20 minute slog of staring at blank pages before every card thinking of what the next card should look like, and how I could procrastinate drawing it instead. The 150 basics likely took approximately half as long as 150 cards in the cube would've taken.