TheNickFox said:
Regarding the cost of glue: you only need one tiny dot of glue on the center of your tabs to hold it. No need to get crazy and smother every tab.
Just start building, it's the best advice I can give you regarding the tab folding. So long as you score your fold lines and give it an initial fold in the proper direction based on the lines (Mountain vs. Valley fold lines) just line up your numbers precisely, and the pieces will fold every piece and line the proper amount. It works because geometrically, those pieces only fit together 1 way in 3D space.
Try it out, and you'll see what I mean. Good luck!
-Nick