I would expect lending institutions to tighten up on their lending criteria because of the worldwide credit crunch. This could even mean further rises in interest rates because the banks are finding it more difficult to raise money on the money markets. This will make it more difficult for house purchaesers to borrow money and this, of course, will mean that house prices will be affected.
I would suggest that it is better for you to wait for some time before purchasing this property because property prices are falling. It would be best for you to see how this all pans out before committing yourself because if prices continue to fall at the current rate you might be able purchase this property (or a similar one) at a big discount in the future.