Hello SeaDreaming, this might be a very good thing, even for a beginner, if You are able to do all (really all, without any exception) the necessary work Yourself, if the boat is so close to Your home, that You can work on her every evening and weekend, and finally if You have enough time for this, could be years. In the end You will have a perfect boat, and You know every part oft her, there are no secrets, she will fit perfectly to Your needs, the best boat in the world (for You).
I know what I'm talking about, because I'm doing a similar project
. If You cannot fulfil one of these requirements, don't do it!