Yeah you know yourself better than anyone else, you know how much this + the vacation will set you back in your bank accounts and towards your goal. Relative to downpayments(which range in the tens of thousands to beyond here in the states) 330 is a drop in the bucket. Plus your gpu is like 6 years old and wasnt that much more powerful than the 480 it replaced.
If it were 9 years ago I’d say “wait and see the new gpus are just coming out soon”, but this gen has been a bit of a bust for gpus. The Nvidias are expensive or lack vram in the budget space, and the current gen AMDs are also more expensive while offering very minimal gains(and in some cases are power hungry). If anything I’d say aim a little higher and see if you can snag a 6800xt for a good price(and if not stick with that your getting).
But yeah if you have the savings to eat the cost without it being much of an issue, and if this isnt going to awaken the shopaholic deep inside I dont see too much reason to not treat yourself. I’m sorry for coming in as the devil on your shoulder, but your thought process reminds me of my own saving habits and it’s important to remind yourself sometimes that it’s good to treat yourself!