Good quality and relatively affordable root canal treatment?

So I've been told by a polyclinic dentist that I probably need a root canal treatment on one of my molars from a decay T.T I was referred to NDCS (ironically I was referred to polyclinic because an NDCS dentist saw me first and thought I did not need RCT)

I'm 25 and fresh out out uni, getting paid an average salary. I've heard that RCT is really expensive, with some chance of failure that could spiral into extraction/implants, and even with success it might not last long. So I'm kinda freaking out about both the prognosis and the cost.

Can anyone help to provide some advice on the matter? Is NDCS reliable? Are there affordable and good quality options in private dentists?