As she was an expensive ewe, I would give her another go.
I've had ewes prolapse one year, then been fine for subsequent lambings.
If she prolapses badly next year (and there's no guarantee she will do), and you can't cope yourself with a harness, you can always get her shot as an alternative to a vet's bill.
An ordinary cross bred ewe is worth putting in for meat and you can get a replacement with the money.
A well bred one costs a lot more to replace.
But often, with just a few sheep, the final question is how fond you are of the actual sheep. I'll happily send some awkward old ewe, that fights me every inch of the way, to slaughter. But one that trustingly stands there, confident that I'm trying to help her, - well I'll give her another chance.