Let's cut the shit. There is no good SET sound for not a lot of money.
Maybe, but I for one do not agree to your statement.
If you cannot build one, what you said is probably true but if you can, and understand what you are doing, then you can have a true SET that is most likely better sounding than what is commercially available and with better components to booth and lesser in price overall. Most if not all of the popular true SET amp manufacturer, Shindo or AudioNote for example, started via DIY.
I mentioned "true" SET because to me, a real SET sound comes from DHT output tubes! IMO, no IDHT SET, like Pentode strapped etc. has the real SET sound. In other words, them are just "wanna be SET's" he,he :)