Hello Neetha, Looking at your post, I’d suggest you use your Voter ID (address proof), PAN (ID Proof) and Aadhar (for FAME II subsidy) and get your vehicle registered on your Bengaluru address. This will save you of the hassles. I assume some of your own people live in that Bengaluru address. Otherwise, use your Aadhar and PAN and get it registered in Mysuru. Before going to the RTO, read the below post from @sachinshastry12 so that you can be prepared.
Scheduled service is not a risk in my opinion. It is once in 5000kms which is probably 6months for an average user in Mysuru. If you have 3 days time (a long weekend for example) with 1 day time for riding to Bengaluru and another day for the return, you can manage. Fellow Atherean @Abhishek has setup charging points at Maddur too.
The real risk is that if there is some unexpected issue with your scooter not starting or something and requires the attention on Ather staff. I wish you don’t encounter that, but that’s the only risk I see. Read the below experience by sachin again