Pullman G. 5000 deposit, balance on arrival. So long as they get notice and proof of reason (like cancelled flight or declined visa), the 5000 can go against a future stay
what Mark said! Find an ASQ that takes a deposit - if the visa fails, or you can't travel for some other reason, you lose a small amount (and a good hotel will let you use that credit for a future booking!)
The 800,000 is required for 2 or 3 months before you apply. The 12 months statements are presumably to show that it hasn't ever dipped below 400,000 in the last year (as that is a requirement)?