I have started the building from a plan I did purchase. So building from scratch is probably the right term.
I am 61 years old and I have spent about a decade working on it.
I use to build sailplanes as a kid and I did purchase my last sailplane shortly before leaving the university and there it is. Still, not even started working on it. In 2000 I lost my last job employed and reaching the age of 45 I was told I was already too old. So after a number of years, I did realize that I would not get hired for a job anymore and that reactivating my old hobby was a good thing to do. Being financially limited I decided to switch to a sailboat. Those do not crash as planes do and so building a sailboat from scratch looked to be a real option.
I need to comment that I use to be a so-called Field Application Engineer for one of the large US semiconductor companies. Then, the career makes you develop into managerial positions. Disappointed by how salespeople worked and I shifted to sales when moving to another US semiconductor company. My active professional employed life did get me to be a Business Developer Director with one of the largest US telecommunication companies.
Due to this history at a certain point of my project of building a sailboat from scratch started to have electronics and informatics becoming the dominant activity.
Another topic that influenced about what I am doing on this project was due to now limited financial resources. So I decided to work on improving my workshop and to organize the many items I had been accumulating over the many years. It used to be easier for me to buy something I knew I had somewhere in my workshop. So this also influenced my activities on my workshop.
Finally the heavyweight of electronics and informatic aspects of my project I started to build an electronics workbench.

Sadly I do have a lot of health problems, 4 strokes, heart-stopping to beat due to side effects of medicine I was taking since I was 19 years old I got a pacemaker. Lately, I am slowed down due to being tired for many hours of the day and by suffering from a reduced concentration capability.

As being positive, as having a well organized day and fascination to force that organ between my ears to work so that it can reorganize itself, I am happy working on the diverse subprojects. So the work for my project has become my focus and objective and not finishing the project.

Thanks to RNinMunich help at least I am able to continue! I publish part 2 again as I can find it on my thread!