I am NOT still admiring the approach, or at least I won't be come November / December. I think you should have another scan (maybe a different one - worth contacting the FACBC trial people?) and then start HT regardless - it is clear from your social media that little P is the light of your life so at what point does sex become less important than his need to have his dad around as he grows up (or at least grows up a bit more)?
You are a clever man and you know first hand that later stage PCa can be horrific. There wouldn't be much sex with lymphodema, organ failure, jaundice, bone pain, etc. Have à wonderful cruise and then it will be Christmas - perhaps then a new year / new approach?