the extra you would be paying for is bodykit ,exhaust , xenons , auto lights , auto wipers , sat nav , DAB , BBS 18s , 30k less miles ,3 years newer , manufacturers warranty not sure what else without looking in to it . question is
1 , is the extra money worth those things extra to you (if not keep your fr )
2 , if you wait till you can afford a cupra , how long is that wait going to be realistically
3 , whats your fr going to be worth when you can afford the cupra , are you going to end up settling for a cupra that is as old and has as many miles as your fr
also saving £100 per month is only £1200 a year, how many years saving at that rate will it take to get to cupra money ?
tbh if your really not sure and are having to think about it too much or talk yourself into it ,then theres probably a reason for that so don't buy it , there will always be another come along . only buy a car if it feels right .