So, I just finished up my Fujitsu AOU36RLXFZ triple zone install (concealed duct). Thanks to many of the threads on here, I *think* I was able to do an outstanding job for about half of what various contractors wanted to charge me.
Downstairs master bedroom has a 9K unit, as does the upstairs kids room. The living room and tv room are cooled by a 12k unit. Each unit has less than 10 feet of total duct work.
I was able to complete the job in a little over two months - working 6 hours each Sunday (kids, family, etc).
This is only half the house though; I get to do the entire thing over again next summer.