Personally, I'd find it difficult to justify throwing 2500 - £3000 on a car worth about £4500.
Actually, scrub that. If my ZF went bust and I had no other option to get her back on the road, I'd part her out, add the proceeds to the £3000 repair bill and get something else. I like automobile, but definitely don't love them. An automobile can ruin you, if you allow it to.
That's just me guys, others will have different views when it comes to dealing with money pits.