Air conditioning work is so difficult to quote for, and the span in quotes from on shop to another vary so much I hate doing A/C work. Quality of parts vary from new to re manufactured like doctors no one wants a come back because they didn't do enough preventative care. Hoses unless they are leaking (always a possibility) can usually be flushed out, the drier is always replaced, along with any seals necessary to replace the compressor. Serious compressor failure can scatter debris through out the air conditioning system trapping debris in the evaporator, evaporator and every where in between. Time spent flushing the system and checking for leaks is critical.