I understand what you said. I'm saying that Italy becomes an option after 1.428.500€ of income. If you earn less thatn that you are paying more than 7% tax on your income so S. Marino is a better otpion.
"with a minimum amount of 10.000 and maximum of 100.000"
I mean it like this: If you are between 10000 and 100000 'ONLY' you can apply for atypical residence, maybe I'm wrong ... Have you tried to contact them? Are there any other requirements?