Yes that would be great. Some startups such as Symme3D also offer many variants of the same printer to accommodate for the different customer niches.
The challenge with a modular system is keeping overall costs within limits. The 3Drag printer is a good example of modular construction because it uses standard components and connection elements. I believe you first need a good vision for your product and brand, appealing to key customers, and then offer customization as a secondary value.