There's a lesson to be learned somewhere between the lines of this listing for a partially completed Bruce Roberts Spray 40.
To quote from the listing:
"The builder/owner started building her twenty years ago... He was to use this boat for himself as he was planning on sailing her around the world. He is now in his seventies and has given up on his dream. The last ten years have not been very productive for him as he has not made much progress.
"The boat is land locked as it is behind the original owners home in Manchester, New Hampshire. He used to move the boats out the back and down the hill to the rear street but someone has built a new home there now and the only way to get her out is with a very large crane."
See the full story here: