Hi @Gerry-Pret !
I would like to recommend tou KAD Upsell app. It will help you create different offers for your customers with and without a discount. Offers will be shown on the fully customizable banner that will match your theme perfectly.
I’m also really interested in your carousel idea, it would awesome if we could discuss it in more details.
More about the app you can find here: KAD Upsell • Cross Sell
Please let me know what you think.