I'm planning to integrate Zoho subscriptions. Before that would like to know how to configure the plan with following need:

- expected monthly payment

- Auto renewal should be optional

- If customer subscribing with non-credit card option, he/she should stay active for that month.

- Customer should perform further month payments manually. In this case how he/she will get notified?

- If customer haven't paid the dues, my server need to keep showing respective instruction before he/she makes the payment.