Im sure there are many RTWs itineraries that will cost less than 10 grand US, especially if you factor in the ForEx difference that brings down your effective USD cost. Given current spreads, you could pay for a nominal fare of approx US$ 13500 with just under 10 grand.... and even if the entire amount is over that the balance can be settled with a credit card.

One thing I do wonder about is the potential security issues as I'd imagine that the ticket may be flagged as a cash purchase..... given the history of cash paid tickets I wonder if this could raise eyebrows....?