you need to apply for a business visa from your own country to singapore if you are planning on staying there for more than 1 month. The length of time varies, so its easiest just to ask the consulate when you get there.

http://www.mfa.gov.sg/content/mfa/overse...

http://www.evisaasia.com/singapore-touri...

i mean i'm a simple italian guy i have 25.000 euro and if I go into business with a citizen of Singapore can release me a visa? and for how many years does it last? thanks for the answers in advance and 10 points insured