Well, the way things are - the house will go up in money anyway if you do nothing at all. The car will continue to depreciate to a point, until they hit the bottom and the cared for, low mileage, best specced will be even more difficult to find, so command a bit more money wise, but who knows when that may be!
I reckon - keep the car if you like it. Fit cheaper non folding used mirrors to get it looking ok, and get the love for it back - replacing it with something comparable in future will be harder than waiting a bit longer to sort the house, IMHO.
You have a house and car - I only have a car, so I obviously favour the car! As long as it isn't critical stuff on the house that needs doing, then I reckon keep going and get to the house in due time.