That isn't a bad price, and I'm down in Savannah (not too far away) and talking with other members about possibly driving to them to do the belt job. I'd be happy to come up there and do the same for you.
I've done a few of these now with my factory tool set, and have it to the point where I can save a lot in time over the factory's disassemble-the-engine-from-the-tailpipe type of nonsense. It is still a solid day of work, but that is because you have to be precise in how you do it. The first step is also the hardest - removing that danged fan that they installed with an air hammer. I have the tools to undo that too.
At 117k, I agree with the others - I wouldn't drive it too far, it needs that belt done pronto. I did my own at 108k and it looked pretty good... But every mile that thing runs, tiny amounts of the rubber surface are wearing off. At some point, it will have worn enough that the teeth have weakened, and the timing can jump. When that happens... Bad things. Expensive things. You REALLY don't want that to happen.
As it is right now, you are probably in a position where the belt alone needs to be changed, and then the pulleys and tensioner need to be inspected to see if they need to be replaced. Ditto on the water pump. Inspections will show whether the bearings are weakening / failing (I haven't found one yet) and started ejecting their grease. The next step in a failure is that the bearing starts howling - This is VERY easy to detect - and then it really starts wobbling before falling completely apart. One happy point in all this: These bearings are the same ones that they have used for regular serpentine belts since at least the mid 90s. I've had (and have still) a fair number of MOPAR vehicles in my own family, one of which is at 250k miles on the original engine.
Only ONE pulley bearing on that engine has ever failed, and none on the other vehicles, all of which are well over 100k. Whether you decide to do just the belt or both pulleys too, that is up to you. I also haven't yet found a water pump that needed service, and my own is at 132k and still pumping away happy.
You should lean on the selling dealer (although that is a pretty good price already) and see how much lower you can get out of them for it. DO NOT, under any circumstances, trust them to do the timing belt and not screw it up! Without the proper tools, the potential to destroy all the rocker arms is immensely high.
As far as the drain plug, I have a procedure that I did on mine, that can fix yours permanently in about 15 minutes. Not a helicoil, an actual threaded collar into the hole, and then a new plug.
The big question I'm sure you are now wondering - how much would I charge for the timing job? Negotiable, but less than the dealer, and you know I will get it done right.
