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...
Do you know what else is hideously expensive? A new $750 million drillship, especially considering that you can get VASTLY BETTER ECONOMY by building...