Pledge and payments tracking

We would like to collect donations by way of a "pledge" system.  Our vision is to ask the users how much they can donate, and then give a flexible payment schedule to pay it off.

What would be the suggested best way to do this using CBSubs/CB?  Ideally, we ask for the pledge amount.  We then give different options for a payment schedule.  1) pay all at once. 2) 2 payments over X years.  3) 4 years with a yearly payment arrangement.  Finally, (which would be amazing, if possible), we show a progress bar as the user makes payments.  Finally, is there an automatic email reminder that could prompt the user to pay as a deadline is approaching?

Perhaps CBSubs Options plugin would be appropriate?  Is there a tutorial file where I can see how to use it?  I have the plugin installed but the Options tab does not show up in the Plan details.

I realize this is a fairly detailed arrangement, which I why I could use your help!  Thanks.

CBSubs isn't really designed for installment payments like that. You'd have to combine a lot of things to get some strange payment situation. I would recommend just offloading that to the payment processors. Both Stripe and PayPal provide support for installment payments that don't require any intervention from you.

With that said the below might work.

Plan 4: Variable Payments
Integrations > Options > Options
Plan Options: Enable
Option 1
Title: Donation
Name: donation
Type: Number
Display Price: No
Required: Yes
Default: 10
Min: 0
Max: (empty or whatever max you want to allow)
Step: (empty)
Price: [value]
Option 2
Title: Installments
Name: installments
Type: Drop Down (Single Select)
Display Price: No
Required: Yes
Base Price: Option
Base Price Option: donation
Value 1: 1 | 1 Payment | (empty)
Value 2: 2 | 2 Payments | -150%
Value 3: 4 | 4 Payments | -175%

The price modifiers are a bit strange here since a another price option is acting as the base price, but we don't want to consider that option in the pricing calculation so we've to remove 100% before we can get to the modified amount. This should work to break down the prices, but I'm not really sure how this really benefits you or them. Seams like a Donation plan where they can just donate whatever amount they want when they want would be sufficient.