Inboard model boats had no "well" in the lazarette. Having one installed would likely not be a major operation, but it would be a good idea to have another boat to look at.

A Commander (same hull) sailed from Southern California to the Med with an outboard. In fact, I believe the engine was left in place and the well open, even in storms. Not sure I would be comfortable with that. We ran the story in the Newsletter last year (check your back issues). Still, for an ocean voyage, I would go for the inboard if you can afford it. Around here, the cost is about $6k using a new Yanmar Diesel.
BTW - The manual has an engine hoist in the appendix that would help you getting the outboard in and out of the well.

See the outboard discussion elsewhere for info on a light weight replacement.