Too much boat: No - they're easily single-handed but its easier to gybe or tack, or "park"
them with a second person.
As for the trip - I think you're on the right lines: whatever you do, do not force or coerce your wife into going - it could put her off the game
Transatlantic is NOT the same as cruising around the Caribbean (or the Med). Even broken into legs (US-Bermuda, Bermuda-Azores, Azores-wherever.you.are.ending up), you are still having to expect up to 3 weeks at sea, out of helicopter range and certainly a long ways away from the USCG! It requires a slightly different mind-set, and the necessary in-date safety gear
to be carried.
All the best for the project
and, having done this trip both ways several times, if I can be of any help, drop me a line. Tony