$3500 includes:
all labour
new oil pressure gauge (from the Fatherland)
new voltage gauge (from the Fatherland)
new wiring harness to starter, alternator, battery
three new coolant hoses
new DME temp sensor
parts to convert R12 to R134a plus recharge
wiring repairs to fuse block area
doesn't seem so bad to me.
You see, time is money. Time, to me, is in short supply but I can earn money. For those with more time, the higgely-piggely method of slow and painstaking diagnosis and parts replacement, trying to find repairable parts, having the car all apart for weeks, etc is a good deal. But not for me.