You can always ask but............I suspect not.
Plus, unless you sell your current house, would'nt you be servicing two mortgages?
Would it not be better to lose this "I would not move or take the job without the house purchase" pre-requisite and take a different approach?
As in, do I want this new job, does it improve/enhance my life, is it a real possibility or not especially given the current economic climate? What would I have to do to make it worthwhile?
mf