There are a couple aspects here...
Since you're in the USA, they cannot remove your warranty for working on the bike, unless your work causes the problem. This doesnt apply outside of the USA, and thats why I asked where you are first.
That said... Parts availability sucks. The parts themselves are fairly priced, but they only ship to dealers. Some dealers will reship them to you (at your cost) but this is far from ideal.
The parts are generally not stocked either. They MAY have an extra belt in stock, but not always.
There is no service manual. So if you need a walkthrough of torque values and how to... there isnt one. This is what prompted
ZeroManual.com Finally, there are electrical and software aspects that you're not going to be able to work on, and will have to take it to the dealer for. It doesnt matter if you're an electrical engineer and firmware developer... you just dont have the tools and info to do what needs to be done, and zero only shares it with dealers.
So if the parts thing and the no-electrical/firmware thing doesnt scare you off... hopefully the forum as a group can help you do things like bearing cross referance, brake pad replacements, fork disassembly, etc.. thats what this forum is here to figure out, and what the ZeroManual site is there to record... but the manual is a new site, and Zero is always updating bikes... so nothing is 100% covered yet.
I suppose the best advice is, expect to occasionally see your dealer, but know that you're not alone when it comes to figuring out how to do it yourself.