contract types

Issue 1:

We have lease contracts for one year werein invoice is sent once a year. Which type of contract do we use here to handle this situation? which billing plan? or do we use a billing plan?

Issue 2:

The customer would like to have contract >order >billing.

I have set up Service and Maint contract which goes from contract -->billing.

How do i create my Service and Maint contract to create an order. When i tried to do it, i get an error saying that the copy control is not maintained. When i tried to do the copy control there is not copy control from Service/Maint -->Or.

Any help in this matter will be appreciated