heroto - you are a seasoned member and cutting yourself short.
100% DIY is my opinion - we are here to help you.
But do maintain a good relationship w/ dealer by bringing in the wheels for tire services as an example where they add true value because of the specialty tools needed.
I recommend a decent torque wrench, actually you'll need (2) and understand how to use it and properly store it - this is the necessary tool to maintain warranty on the bike.
KD Tools 3262 and sibling 3264, plus 1/4" to 3/8" adapter will serve you well at likely the same cost as the first service - the models cited come in nice protective cases.
Standard metric allen and deep well sockets set, a few extensions and a smallish T-handle for body-work fasteners - don't cheap out on brand, you didn't on the bike.
On the electronics side - there is always a dependency on the dealer but this will change as the bike's connectivity is studied, understood and hacked for good reason (I'm active in this realm and plan a low-hanging-fruit open source solution too early to disclose details)
End-user product sustainability - I don't want to make my bike a throw away or an early trade-in. Which brings up a good topic for new thread, cell-chemistry obsolescence / stocking safe-guards e.g. what happens when the weak sister surfaces after the warranty?
