I thought he said early fall in one of his interviews.
And I'll never be 100% convinced Riff Raff's trolling. When he was on From G's to Gents there wasn't really the market for what he does, the way there is now. And he was practically the same persona, just a shittier rapper and trying harder to impress everyone. I think it's always been an act but when he started it he was trying to be serious, once he got popular from larry bird and clicked up with 3 Loco he realized the humor of it all and that's the Riff Raff we see today.
*This was an excerpt from my senior thesis on Trolling In Hip Hop