I also think one year may be pushing it, but it's all about timing the weather
windows as you're passing into the different areas of the world. As OG said it's covered thoroughly by Jimmy Cornell.
I am also a tri guy and have bragged about their speed but that doesn't necessarily translate into markedly faster passages overall. Maxingout on this forum has a good discussion of this as it related to his circumnavigation
in his cat. If you've got a Ferrari that'll do 185 it doesn't mean you're averaging even 90. The speed potential creates a comfort cushion - if you need it it's there.
Corsair's are good production tris which are more toward a racing
Chris White is a good multihull designer
and a number of shops build his designs.
Existing Searunners are excellent older tris.
My favorite design is John Marples Constant Camber series (in many ways an updated Searunner). There's a shop in the Philippines
that builds them and probably be able to fairly inexpensively. If it's a circumnavigation
it could begin & complete from there, right?
So, no question if the desire is there, how can you not go for it?
And as this progresses definitely keep this forum updated, we'll all be wanting to keep track!