If I remember correctly, and that is debatable on a good day, the old diesel manuals were based on the engine running 24/7 which is about 4000 hours...
She looks like the perfect vessel for your plans so, congratulations, you're not totally off your rocker (well, unless she is made of something like...
You are forgetting one critical point, I have spent most of my career on ships so I have absolutely no experience inside the beltway (or in an office...