How to reveal information on a dynamic page upon form submission?

Hello!

I am building a real estate website and using dynamic pages for all of the property listings. When a user selects a given property the site brings them to a detailed information page regarding the property (dynamic item page). On that page there is a ROI (return on investment if you buy the property) field which I want to reveal to the user only after they have given us their email address and name.

I thought of a way but it doesn’t seem to work. I created two identical dynamic item pages with one sole difference - the first one has a button “Reveal ROI” instead of the ROI field and the second one has the actual ROI displayed. When the user clicks the button, a lightbox with a contact from appears and upon submission the user is automatically redirected to the second type of dynamic item page with the revealed ROI. Unfortunately that doesn’t work since the form can redirect the user only to a specific predefined item.

I’d very much appreciate any ideas how I can make this work!

Many thanks!
Bobby