Harry Poter

I'm looking to buy a "91" 348 with 8000 miles major service has not been done yet. Any caveat to look out for this car.Major service has not been done on the car ie. timing belt. I was told when the belt is done a host of other things should be done at the same time. Any Idea on a rough cost for this work 8-10K? Thanks for help first time blogger.