Help me marry my dream girl.

I have been with my girlfriend for over two years and we are currently saving for our first house. I am also in the process of starting up my own photography business, both of which take every spare penny I have. Nothing would make me happier than being able to ask my girlfriend to marry me but I simply cannot afford to make it happen. I have had an elaborate proposal planned for a while which involves a trip to the arctic circle and a hot air balloon ride. I have put as much money towards this as I can afford but I am still short by £2500. Any help given would be hugely appreciated. Thankyou for taking the time to read this.