How to calculate the design fee of home improvement company?

Designers need to be paid. For regular home improvement companies, design fees are not charged, and the expenses are borne by the company, which will inevitably increase business risks. Therefore, the home improvement company will not pay the designer's fee. This shows that the design fee exempted by the decoration company finally falls on consumers, but the money is not light.

Withdraw/accept commissions/kickbacks

Introduce consumers to his familiar building materials suppliers to buy main materials and then get kickbacks!

The budget list is unclear.

The material units in the bill of materials are vague, mostly "items" or "sets", from which many articles can be made.

Complex design scheme

Add some dispensable designs to increase the budget!