Seriously mate, do a fuckload of chores and suck up to your mum and convince her to give you the money. If you can't use this foolproof line which helped me convince my mother to let me go to the 2006/07 GF in Melbourne (Doesn't matter if what you are saying is true). I was like ten at the time so I have developed it a bit furtherI don't have money to get a ticket
'Look I am not passionate about many things, I go through life not happy a lot of the time. Football is the thing that drives me forward, football is the thing that gets me through the week. For the 90 minutes I am able to forget about the game and just support my team. It is my one passion and thing that I feel most confident with. I can understand if you don't want to but are you really going to take my one passion away from me?'
Done.