I'm looking to do the same. I came up with an option but it's not the best implementation in my opinion. I'd rather use a script if possible to simply remove the recurring price if one selects an option.

I have printers that can be either leased or purchased. My approach was to create a 2 catalog items, one with the recurring price and another with a purchase price. Because we have a single form associated with it, I could utilize an order guide to fill in any necessary information and then have the form determine whether or not to display the lease or the one time purchase catalog item.

The only draw back is the ability to display the printer nicely as in the catalog item. I have to use multiple choice options on the "describe needs" page and then present the item view.

I don't know if this will work in your situation but it the only non-code solution that works well if you have multiple items that are in the same recurring/one time purchase bucket.