I guess now it makes more sense, and I supose one can reach a level in which one just don't have to cope with ordinary clients if that's what it takes to brew the good stuff anyway

I just asked this the first time because I remember one very old guitar player magazine that I still have (dunno year, but probably 90's or early 2000s) featuring a "deaf jam" that they tested every 100watter they could get their hands on. Among marshall SLX, Boogie Tremoverb and Fender Tonemaster, the Dumble OD was reviewed too.
At the end of the article there was a very interesting note saying that the Dumble amps took a long time to be built (2 every one year, thus being very exclusive) as it was a thorough one man only op, but at that time, so the magazine states, Dumble was looking for a way of mass producing his stuff, maybe an investor, or a partnership with a large brand.
If anybody's interested I can go look up exact issue and year, but you guys probably read it too...
I guess that never went off.

Ed
Edit: at that time, price was US$5300 more or less