Monthly payments are often available. However, this is for annual cover rather than a pay-as-you-go arrangement. Some policies can covr you for a specific time frame as and when you require cover, opposed to annually.
No, not automatically. Cover for travel or overseas work is usually only available if an overseas extension is selected, and this is not offered on all policies.
This depends on the type of work you do while self-employed. Insurance is usually required to cover your self-employed activities separately from any employed work.
Yes, for activities you have declared. Cover can apply to multiple activities or income streams, as long as they are disclosed and included in your policy