A) How many suits should I own to pull this off?
B) How does one keep a suit clean, wrinkle-free, and smell-free if it can't be laundered more than once or twice a year?
invest in a good steamer and a clothes brush and Bob's yer uncle.
unless you go commando your underwear provide enough of a barrier to protect your trousers from all but the most noxious of emanations.
It's pretty much why we developed drawers anyway.
That's the beauty of wool...if you air it out most odors will go away. My understanding is that dry cleaning only attacks oil-based stains anyway, and won't remove ass funk or other body odor. I hand-wash my odd trousers in cold water and woolite, then press with a steam iron and pressing cloth(to keep them from getting shiny)...Suit pants and jackets get drycleaned together, so if there is any fading, they will fade together.