Finally, deciding that I had come to the end of the road, I wrote a note to the boatyard, putting my boat up for sale.
A.
Finally, realizing I have few days left, I wrote a message to the boatyard to sell my boat.
B.
Finally, realizing that I have no place to go, I wrote a letter to the boatyard to ask them to sell my boat.
C.
Finally, deciding not to think about this question anymore, I wrote a message to the boatyard to sell my boat.
D.
Finally, deciding I could not sail anymore, I wrote a letter to the boatyard to ask them to sell my boat.