The first type of custom clothing design is called "bespoke". Bespoke design is the design that you and the designer of clothing come together, and that is built by local craftsmen or a workshop specifically for you.
After you and your designer approve the design for your clothes, the package is sent to local craftsmen to be made according to your request. If you want a wardrobe that will fit very specific plans and dimensions, you might find that bespoke design is exactly what you are looking for.
However, if you are only looking for a simple design wardrobe, you will find that the choice of a special design wardrobe will be enough. Typical custom built-in wardrobe allow you to choose the dimensions, design, and style of your clothing from the existing models offered by designers.
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All options that you present already exist and have been produced by a clothing design company, but you can adjust the installation and design.
Using a special wardrobe does not mean you get one specifically for you according to your request. You get an existing wardrobe and are being modified to meet your space and style needs.
This makes the price of the designer wardrobe option much cheaper because it does not need to be made by hand. Seeing that they are part of the existing design by manufacturing companies, a designer wardrobe is much cheaper than a bespoke solution.
Just because the material for your wardrobe has been produced does not mean that your special wardrobe will be of low quality.