The final stage of this cache is located a short distance away, at:
N 40 27.ABC
W 080 00.DEF
A: Number of signs pointing WEST on the signpost on Jacksonia St.
B: Number of doors on the south side of the garden with "Welcome" signs on them.
C: If A=1, B=2, etc, what major key is the musical score on Arch St. in? (Hint: look at the number of sharps (#) and/or flats (b) at the beginning of the musical staff, then consult http://method-behind-the-music.com/theory/scalesandkeys#sigs )
D: What color is the suit of armor inside the garden? Blue=2, Silver=5, Green=8, Red=9
E: The number of sixteenth notes plus the number of eighth notes in the musical score to the right of the Arch St. garden entrance
F: Add up the number of butterflies on the Arch St. side of the house, then subtract 10.
Note that A, C, E, and F can be figured out from the sidewalk, but B and D will require going into the garden behind the house. The garden is free and open to the public daily from 1-7 pm.
You may bump into Randy himself while you're visiting Randyland -- if so, say hi and tell him you're a geocacher. He is very friendly, and excited to have geocaching bringing more people to see his art. The final stage may require a little stealth. The container is big enough to trade small items and drop off trackables.
You can check your answers for this puzzle here. NOTE: Randy is always making improvements to his place, and so it's possible he's changed something since the last time we updated the puzzle, but if you give it a shot with the checker you'll get some help in figuring out the final location.
Congratulations to mdurf and durf57 for the FTF!