A few Timing Belt replacement questions for 93 J30

[j30WAY]

Hey all, I've read through lots of DIY timing belt posts and websites. I still have a few questions that I haven't been able to find answers to. First and foremost they list changing , camshaft O-ring seals, camshalf oil seals, crankshaft sprocket plate, crankshaft oil seal. Are all of these necessary. I ask for 2 reasons: 1. I'm kinda financially strapped right now, 2. I don't know if i possess the technical skill to accomplish all of that successfully without causing any damage to any components.

I was originally planning on replacing the Timing Belt, The Drive Belts (A/C,Alternator, PS), Hoses, and was undecided on the water pump as it was changed 50,000 miles ago.

Also does the tensioner need mandatory replacement as well. Cause everyone always talks about just the timing belt needing replacement.

And lastly my timing belt arrived today, its geniune Nissan, part # 13028-45P86, is this the new Kevlar belt?

Any advice is greatly needed and appreciated. If it helps any the car has 119,000 Miles, I've had it since it had 56,000 miles.

Many Thanks in advance!!