Thanks eprasu for your reply. What i can understand is that it will be better for me to get my family on Visit Visa, and then go for medical examination within a month and then apply for extension of visa.

I already opened up a bank account. If i opened up an account on say 20 October than i will have 3 month bank statement on 20 Jan and then i can apply for Resident permit. Sounds ok

Can you please let me know what are the requirements in order to apply for visit visa for family.