You made a guess at an overall requirement, There are people who say that losses can be unlimited. I would like to see mathematical proof.
He can easily verify it by doing what I suggested.
The losses cannot be unlimited when selling a put and anyone who doesn't know this shouldn't be trading.
While here is the proof showing the required margin on my account for selling the same SVXY put and for couple expiry dates, specific to the portfolio, not a static number like $6K: