It's safe to say way more than 30,000$ per month.
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Last record of his real income in $ from patreon is from 2017, he gained 11,000$ with 1,400 patreons.
Today he now have 7,000 patreons. . .
The day real programers/3D model artists will realize the amount of money they could get from these games, we'll be blessed with REAL games.
Games like these are made by lazy people, that once they worked few months, become tired and just don't see the point of working if they still get 30,000+ $ / month doing nothing.
With this money he could have rent a villa, hired 2-3 developers to develop the game for him, a CM to do the communication job, a real 3D model artist etc.
But hell no, he's just so lazy, he's just gonna sit on those dollars.