[Stuart Christensen] “I exclusively use a three button mouse, (LeftMiddleRight)”
There’s no scroll? If your mouse allows, it’s possible to use the scroll to expand and contract the timeline.
You can also shift-z to zoom all the way out, then press and hold z and lasso a selection in the timeline, and FCPX will zoom in to that selected selection. Then press and hold h and drag left/right with the mouse to move the timeline back and forth.
As far as the importing, you can add folders to favorites in the import window. You can also simply import the master folder as a keyword collection (say you had a folder called 20 W 5th St, or whatever). This would should up as one keyword called 20 W 5th St in an event in your library, and you can browse through it by content created (order in which it was shot/created).
Also if you know a folder name, hit command-space from FCPX, type the folder name, and drag it in to FCPX, as has been mentioned.
You may also consider setting up a template library that has all your reusable media (effects/music/art/whatever’s) organized and ready to go. That way, every time you start a new library, all that stuff is already in it. I use FCPX Library Manager to manage libraries and it also has a template library function.