I will be the odd man out here. I can't imagine any shop charging $200 (2 hours) or less to R&R timing belt.
You need to remove coolant hoses, drain coolant, remove water pump, remove accessory belts, remove timing cover, lock timing in, remove pump, reinstall, bleed system yadda yadda.
I would expect 5-6 hours.
On a 200tdi you are correct, on the 300tdi no need to drain coolant or remove the water pump.
Without complications (seized fan clutch, or some other nonsense) I can have the IP out of the truck in 30 minutes, and another hour to put it all back.
The process is:
Fan shroud off, fan off, belt off (just the one with a spring tensioner), crank pulley off, cover off (12 bolts), lock IP, tensioner and timing belt off, IP removed (12 nuts/bolts), IP replaced, timing belt and tensioner mounted, timing set, crank pulley on, cover on (12 bolts @25nm), fan on, belt on, shroud on.
First time you should expect everything to take twice as long, and the job is always easier with a clean truck and pneumatic tools that fit into the working space.