I reckon get it sorted mate and keep it, you'll be so much more proud of it than u were already if u do, it would be such a shame to get rid of it, bit by bit too.
Tbh, I can't talk from experience, as I've only been driving my first car since the beginning of June, a 1.3 MK2 Golf with GTi bits, it's got nearly the whole bodykit, lights wheels etc just needs big bumpers, and all I've done to it is put a GTi grille on it and smoked side repeaters apart from the other stuff my brother did before he sold it to me. He had major problems with it which cost a fortune to sort and get it through an MOT - but he didn't scrap it and I know he's so glad he didn't, so I've always said whatever it needs doing to it, I'll get it done, even if I have to buy a f*cked £150 Fiesta and drive it for a few months while I do it.
I know you have to consider all the options mate, but really if you like the car that much and you're that proud of it, there is only one option...........