Individuals are no longer allowed to make real money - only large corporations working for the ruling oligarchs are. That is one of the rules of crony capitalism.Seems they're trying to push the individual inventor out unless he has very deep pockets.
I also have a few patents but for many years I've concentrated on getting first to market instead. Additionally I have tended to place important functionality in mask-programmed components, making it difficult and expensive to extract and understand the software.
I'm now in the process of making parts and should soon have something to show .