IMHO; You can tie the knot at the local courthouse to make it legal and then plan a REwedding for a later date after saving your money. You can still make a courthouse wedding an 'event' although lower key. It's done more often than you might think.
As for a car, why go into deep debt with a 'new' car and adding the stress of making BIG payments ? Purchase a reliable older unit for CASH. LESS MESS - LESS STRESS!!
Good luck !