Ciao Lorenzo, congratulations and thank you very much for sharing your project and your enthusiasm. Grande, cazzo!
I live and farm in Central Italy as you do, in a slightly higher location (580 MSL) with a similar mediterranean climate zone (we are almost in the same bioregion!), and I have to say that it has been a real pleasure to read your project also because of our geographical closeness.
I can offer you more than my best wishes: I offer you Prunus domestica ssp. Insititia trees. It is a plum cultivar, close relative to the “Ramassin della val Bronda” registered in the Slow food's Ark of taste. My family has always had these kind of tree in the yard in the last 60 years, and they are one of the most suitable fruit plants for permaculture. I don't want to hijack your post, so I will skip any other information and I will go straight to the point: I have some 40 or 50 young trees in my nursery (1, 2 and 3 years old), if you want them they are yours to take, NO MONEY INVOLVED. If you are interested in those trees you can contact me via email at email@example.com
for any information.