Solving 100 variant limit in a Headless Shop

[Benjaminka]

Some context:

We are migrating a Shop to Headless and we encountered a problem with highly customizable products and the 100 variant limit. I would like to know your opinion on the proposed solution and if some one can think of a more elegant solution.

What we want to accomplish:
- We want to allow users to customize products in many ways (Colors, Lengths, Type of material, Measurements, Extras etc.)
- Choosing some options should result in a higher price
- Discounts should be applicable to the total price of the product (Including the extra price coming from the option selection)

The problem we have:
Since we have many options we can't treat them as native Shopify options because that would result in more than 100 variants. We have products with more than 7 options, more than 100 variants and more than 4 options that cause extra prices

Idea to solve this problem:

1. Save possible options as JSON string in the Product Metafields

2. Have one variant per paid product option with the extra price that clients would pay for it

3. When selecting a paid option, internally add two variants to the cart (the selected variant + the variant that represents the option that highers the price)

4. Programmatically display both products as one in the Frontend and in the checkout using Shopify Functions