I can relate to your frustrationsthey have the cooling system drained and replacing the water pump and timing belt, I have replaced lots of cooling system connectors and hoses in the past and just trying to figure out why this is so high when the cooling system is already drained. I assume it must be way more complicated than I imagine?
I went to Toyota for a quoted $180 brake flush. Brought 4 OEM brake lines to replace the old ones since they were being drained at each wheel anyways. Figured it was like 8 extra bolts and they might charge me another hour of labor since the drain already overlapped.
Ended up taking them about an hour longer than quoted for the brake flush so i figured my guess was right. Went up to check out and the bill was ~$1150 with brake flush + 5h labor. Argued with them for like 45 minutes and they never backed off the price