Once in a while a member will post about starting a business. While the link is more for wood workers and is USA biased there are some things that might be helpful.
https://www.youtube.com/watch?v=9hp409oQD7s&t=521s&index=138&list=WL
https://www.youtube.com/watch?v=9hp409oQD7s&t=521s&index=138&list=WL