Great decision to go cruising. A few questions for you. How seasick do you get. Many people feel sick for just a few days and then magically, they feel OK. Others are like death warmed up. Where do you fit in?
If someone could feel a bit off, I give them a job to do - like steering or 'on watch'. Having some responsibility often means they havent got time to be sick. This would be you if you are the skipper - plenty of responsibility = no time to be sick.
Also if you know you are prone to seasickness, why sell the house - you may need a place to go back to??
Anyway, just my 2cents worth.