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90 kayjees is a shit load! That surely can't be right, is it a typo?
Do you need assist or could you get away with analogue / Rule 5 power? The cost of that bike puts you well into perfect condition secondhand Bullitt territory, which I think will be a more versatile bike and will have better resale value. You won't lose anything with a Bullitt. Weight with a couple of accessories like custom baseboard or partial box will be closer to 30kg too.
If you're only carrying 60kg of tools, rather than anything particularly heavy or bulky maybe a Bullitt is a better bet anyway? Urban Arrows are great but they're pretty cumbersome, probably overkill for what you're looking to use it for. The Bullitt rides a lot more like a normal bike in my experience.