I'm going to the bank next week to find out how much we can borrow. It creates a highly variable deadline for so many, many other things. It's a new kind of anxiety.
It is kind of a pain in the arse, but once you have some idea of the ballpark figure, it might be worth talking to a mortgage broker to see if they can get you a better deal (or a deal with conditions that work better for you). They don't cost you anything (they get a commission from the lending institution) and they take most of the pain out of the paperwork.
This may not sound like the snappiest line from 2001: A Space Odyssey (1968), but it evidently caught the imagination of John Landis, who has worked references to a mythical film of this name into most of his own movies - memorably as the grotty British skinflick watched by an assortment of lycanthropes and zombies in the climax of An American Werewolf in Paris [sic] (1981).
Ghastly Beyond Belief, Neil Gaiman and Kim Newman