Thanks @Wise .

Option 1:

1) Once subdomain is created then it will create a sub folder .

2) What should be next step? Do I need to install jot server on domain name or I can change existing working installation to point it to new domain?

Option 2:

1) Once I will buy new VPS then what steps I need to do in order to ensure that both vps is connected to each other?

Thanks,