hii: You realize he's talking about a pro firm here? Standard margin rules do not apply. Neither is "get your money out now" usually an option, especially if they're closing their doors. My impression from scouting a couple well-known firms is that $2K is roughly the same as $0 - you're basically trading with the firms capital if you're doing enough size to make a living. What deal you make seems to be related to your experience, profitability, risk profile, etc.
Got monthly sheets of being net profitable especially with volume??? That's as good as a capital contribution to most of the firms if you explain your story. A lot of individual traders doing well in a firm with some capital or a firm owner /manager would back you.
What does he have to go through to get his money out of the prop firm before they've ceased operations? It may be difficult, but surely someone has some advice what is involved and what's the best way to approach this situation?