You have a long and fine tradition of boat building in Holland..
Why don't you talk with local boat builders/ship yards before risking your money...
To my knowledge USCG has the full authority to ask = command (!) the owner to leave any vessel..
Why do you want to sail this boat without engine?
It is already there..
A well cared engine is always ready to run.
Especially diesel engines...
Rather unclear pictures..
During time Oak reacts with iron creating black sediment from corrosion..
Any nails seen?
How 'floatable' is that...