No, if you put the 6K on the card, you're limit is still the same, but you are charged less interest. You can then take money off the card as you need it and you are then paying interest on the current balance. e.g.
Balance = 20,000
Payment of 6,000 Balance = 14,000 - interest is now calculated on this balance
next week take out 500 Balance is now 14,500
and so on.
'will be more useful than more debt juggling.'
it's not juggling debt it's minimising you're costs. Not minimising your costs is the difference between having enough cash to be a startup for another 6 monts or not
30,000 @ 20% interest = $6,000 p/a
30,000 @ 3% interest = $900 p/a
To maintain the 30,000 debt on a card you'd have to come up with 6,000 a year if it's a personal loan it costs you $900 a year - so fo a couple of phone calls you can change your costs by more than $5,000.
'I would be cautious about falsifying a credit application.'
I never suggested any falsification, this is debt management 101.