Lots of good thoughts here, but nobody has mentioned what I think is the real key:
If you're going 'round the world or etc., you're going to be sailing in conditions that a lot of the arm chair beer-swillers won't see. Eliminating the main also eliminates a lot of support for assuring that the mast
stays in column and doesn't decide to put it's head
in your lap. Laps were never made for mastheads.
If you ain't gonna eliminate the main, then all those points above about the good things a boom does for a main apply.
Lots of construction projects in Kuwait. You must be able to buy him a hard hat to wear in the cockpit
. (I once wore one on an the foredeck until I shamed the after-guy trimmer off the boat. He only "tapped" me on the head
Get an e-mail off to Kalik or any decent Naval Architect you know or talk to a rigger or sail maker about this before you go ahead with this.