Don't panic there are not many people snapping up properties atm so I'm sure you'll have time if you can get a buyer.I would chexk out the mortgage first 5x is a lot but you have a big deposit so should be easier
They have really tighened up the guidelines for mortgage offers at the moment. They are unlikely to offer 5x a salary IME butou may be lucky. Whether it would be real luck is questionnable though as there is a good chance that the market has a significant way left to fall and if it does you could end up in negative equity. Think hard before putting yourself in such a vulnerable position.