It is not a huge job on a 617. The hose itself is only a couple of dollars. You will want new upper & lower radiator hoses, perhaps trans cooler lines & a water pump. Go look at it and see that you can do it. You really need to consider another vehicle if you have to farm out that type of repair because the bills will easily be more than the car is worth.

The water pump is not $600 unless you buy OE. There are good alternatives on this site. I just bought one.

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85SD 240K & stopped counting painted, putting bac together. 84SD 180,000. sold to a neighbor and member here but I forget his handle. The 84 is much improved from when I had it. 85TD beginning to repair to DD status. Lots of stuff to do.