Only I doubt the "loss after 5,000 spin = $250" part. The thing is that the RTP of slots is 95%, on average, when millions of USD is wagered. With just $5K it can be more risky: you can win something(or even win big), but you can also lose your $5k completely. Not many people can afford wagering $5k within one week, unless the money is not theirs, but the casino's.
Yep, there will be variance, but I doubt there will be zero wins after 5,000 spins. Let's take a look calculation from
digdia.com with assumption high volatility slots (other variables stay the same as above):
He will be within -$859 to +$359 half the time and average loss of -$250 (HE).
If he plays 5,000 spins every week, I believe his loss will be closer to the theoretical RTP. As long as he prepares for a terrible visit of -$2,020, I think he will be fine since he has multiple revenue streams.
That's what I meant, basically. He will hardly lose his $5k completely within a week, that's true. But he can easily lose more than $800, big money to lose in one week for most ppl in the world. Without a sponsor from the very beginning I personally wouldn't start such activity.
EDIT: To stop going out of topic, check out this guy winning 3k EURO hitting as many pharaohs as possible: