[vidarh]

Yes, you can, but I have no interest in building my own. I don't need these things badly enough to be willing to invest much time in it.

Things like a single dimmer etc. is not the problem, because for simple stuff like that there are plenty of off the shelf options.

The issue is anything that deviates from what manufacturers expect. And yes, I'd be happy to use a lot like that for that even at a quite high cost because the existing options to do it cleanly without a self build are also expensive.