Ability to Offer 2 Different Payment Types

I am building a donation form for Boy Scouts.  This form will be used for donors to make large donations.  I wnat the ability to offer them a 1 time payment of the full amount, or the ability to spread that payment over (x) of Months.

Typically we use the PayPal option.

I would say sell subscriptions is the best method to do this.  Is there a way to set the PayPal Amount and Recurring months from form fields.

My logic thought would be the following:  If user selects 1 Time payment (Set Number of Months to 1), and set sub total field to Gift Amount Field.

If user selects recurring payments and (x) Months, Set Sub Total Field to Gift Amount / Number of months.

Pass Sub Total and Months to Paypal for processing.

It is possible to pass a calculation value in the payment tool. Here's a guide: How-to-pass-a-calculation-to-a-payment-field.

You will need to create 3 forms if you want to have 2 payment methods in your form.

1st form = PayPal 1-time payment
2nd form = PayPal subscription
3rd form = Main form

After that, you will need to embed the 1st and 2nd form to the 3rd form using the Iframe Embed widget. 

You can actually check the complete guide here: How-to-Create-a-Basic-Multiple-Payment-form.

Let us know if you need further help Thank you.

Jan, Thanks. I had a feeling I was going to have to build different forms and select based on 1 time payment or recurring.  Help guides are really good.

You are correct, the reason is because you can only have 1 payment field on each form. Glad to hear that you like our user guides. If you need our help, let us know. Thank you.