If you're trying to save up for a deposit, surely the best course of action would be to sell the VXR, find yourself a decent-ish GTI (if it must be a GTI - a mapped TDI would nearly be as quick and much cheaper to run), save as much as you can from the sale of the Astra and be content with something 'fairly' quick for the interim. The sooner you get the house, the sooner you can stop saving and buy something decent again. Just a thought.