While this does not directly answer your question, I can shed some light on Italys motivation for their invasion.

The scramble for Africa was a defining period for European powers to cement themselves as important on a global scale. Powers like Germany, France and Britain had already 'carved their chunk' of the continent, so there wasn't much left for Italy to claim.

Italys first choice for expansion was naturally Libya, due to its convenient position across the Mediterranean. Italy made advancements into the country politically with the setting up of Italian banks in Tripoli, potentially leading the way for further expansion there. However, they were too slow in their movements so turned their attention to the next available target, which was Abyssinia.

At this point in Italys history it was a new country (just over 30 years old), and there was a lack of national identity amongst citizens, especially those in the south who resented the sudden 'Piedmontisation' of the country. This lack of unity, also known as campanilismo, meant the government felt a military conquest was necessary and would bring Italys people together, so they attempted the invasion of Abyssinia.

So there's a more political explanation for you rather than Italy wanting resources; the primary reason was a young Italy facing problems of disillusionment amongst its citizens.

If you have any more questions about the political climate of Italy around the time I'd be happy to answer.