I can't speak for Italy, but in the United States $2,700 before taxes is $32,400/year. That is the definition of barely getting by, and would qualify him for financial support in almost every state in the US. So while maybe BorgiaBou may have been wrong about Italy specifically, you're incorrect to act as though $2,700/year is good money everywhere.
Edit- To keep this on topic though, I would just reiterate that I think Stoper is leaving a lot of money on the table because of his development cycles. Clearly this is a passion project for him, and that's cool; but objectively I think there are thousands of dollars out there that he could earn if he was able to buckle down and put out consistent releases. Not everyone is driven by money, and Stoper is clearly not a greedy person, I'm just stating what I think is a fact- he could be financially much more successful with this project than he currently is.