Can you renovate your own house in Italy?

My husband is a contractor and close to retirement. We are looking all over the world for where we might want to live.
Le Marche Italy looks like it has some great opportunities for a guy like him to buy a house and renovate it.
All the research talks about hiring a Gometra. I know we would need to hire someone to help get us through the permitting process, but are homeowners allowed to do any of the work themselves? What are the limitations?
We have enough passive income so we shouldn’t have any trouble getting a residence visa.