It's not all tied up in real estate. Recall he has a lot of the equity in Truth Social, which he is trying to sell at an inflated price to DWAC. He is just as much of an internet influencer these days as a real estate investor.
But I think it is telling that a key point of the trial was that he overinflated the value of his assets, and now that he has to put up cash, all of a sudden we find that he can't put up enough collateral, because banks are no longer taking his word on those valuations.