I want to stay indonesia for 6 month

Dear
i want to stay in indonesia for 6 month,but i have no sponcer to give invitation letter.how can i apply for visa can have any suggetion.

Is there is any other way i can stay for 6 month i m going for some etablishment .
i have to open a office .regarding that i have to stay for 6 month.

That's work so will require a work permit and KITAS.

what is the process of work permit.

Is it your business or are you working for someone?

i am a market analyser i want to go for some market knowlegh.