I think that's very plausible. I don't think Trump himself is deeply involved, but people in Trump's circle are definitely aware of it, and trying to milk it for all its worth.
I suspect Q was initially viewed by these people as a simple way to deflect Trump's own links with sex traffickers like Epstein, but as the mythos grew, and became correspondingly more insane, it took on a life of its own and escaped their ability to control it. But by that point, it was too late, Q was running riot through Trump support networks and it was a case of "swim with the current or drown".
At this rate, Q will be the mainstream Republican position in 4 years. 2, if Biden becomes President.