Just tell them you will pay the 10K in 8 weeks or as soon as you are disfellowshipped whichever comes first.
Why dont you call Brooklyn Bethel and ask for their advice -
'hey I'm about to get DF'd for apostasy but my JW folks need 10k off me to pay some credit card bills. Thing is they don't want to take money of a disfellowshipped apostate for conscience reasons, so they would prefer to have the cash before I get DF'd. Just wonder if you have some advice for them? What bible principle applies to taking money of a disfellowshipped relative, or an pre-disfellowshipped apostate relative?'