A couple of months ago I had Joe T @scottsdale build a J30 timing belt kit for 1993 model, and and the 1994-1997 model. The kit is what you will need to accomplish a complete 60k engine maintenance on the J30, and the 300zx I recently purchased on of these kits for my own 93 J30T and I suggest you do the same. Here is the link for the J30 kits:
http://www.trademotion.com/par...34382
$1000 is a bit too much for me regardless of what dealership since this engine is very easy to work on...everything is in the front for easy access.The kit costs around $350 shipped and labor should be no more than $400 which is what my local shop charges according to my labor math using an alldata and a mitchell shop labor system.
Do not go with local shops that use non-oem parts. You can tell the difference from nissan OEM quality vs generic manufacturers. One thing that the kit does not have is the idler pulleys. Advise your mechanic/garage to check these out when you get the job done. Usually they are okay, but, if there are suspicions, replace them.
This is a beautiful car with an almost bullet proof engine. The waterpump is in the area of the timing belts and the recommendation that you should do it is correct. Buy the J30 kit and you don't have to revisit the issue for another 60k miles.. Good luck..