Pulled the trigger and got the bike. Can anyone recommend the specific “non-typical” tools one will need to do most any maintenance or repair as a DIY project? Obviously you can leave out tools that are only needed for jobs best left to a BMW shop. Thanks.

Look here first.....
Videos, instructions, DVD, resources, tools list (scroll to bottom of page), spec sheets, capacities, etc.
I highly recommend his DVDs....
http://www.jimvonbaden.com/Wethead.html