Thanks for the support @alexaser!
Like Andrea says, it also depends on your backend solution. Once that is ready I could assist you in hooking Armory onto it if needed. (plus can document the process along the way.)
If you want to build configurator of predefined items / colors (so it's all packed in the app itself), then that should be quite easy. You would be just changing materials and possibly mesh data of included scene objects (this will be doable straight from logic nodes in build 10).