Before you start talking about what equipment you can buy, find a really serious electrician (where are you, geographically?) who can "audit" your electrical set up. I spent money on power, but made sure the basics, starting at the service entrance, were in order.
Mr. Fremer did a video about the noise from his Generac (Mike?) which turned out to be a combination of long standing electrical problems, starting with corroded contacts where the meter plugged in.
In my estimation, it’s all an expensive bandaid until you address the basic delivery of power to your house, building and system.
See what you have and deal with the problems there first; the rest should come easy. I did not stint (this isn’t about saving money, but it may be that you need very little to "condition"). With "conditioning" or black boxes, I’m always afraid of baby with bathwater. To me, before spending money on conditioners and black boxes, it make sense to assure you are getting the best results from the power provided to you. A lot of residences and commercial spaces have terrible power that can be corrected by good practices. That’s where I’d start.