IMHO 8k liga ker ghabra gaye ho dost...
its not a chonda 70 off-course and a bike with broken leaking magnet cover is going to die in any case you should have taken care of it in the first place and get it checked just after buying so that nothing is missed but as it is screwed now and you are already not feeling confident by only spending 8k you think its already to much that means you should not choose 125 class rides as they aer expensive to miantain.
Your Decsion is correct to go for a smaller cc class bike, but believe me cd100/pridor is almost same expesive as paiggio as its all spare parts is only available in orignal AHL anttenas shop only not to mention only head Lamp is 750RS to 1000RS ... so it would be again a bad Idea.
Buy a china 70 its economical its cheap to maintain and all can be refurbished in cheapest manner possible... dont think it look ugly or its like a cycle.. becuase if u think its a cycle then you already screwed a nice 125 which means you must stay on cycle for a while so that you learn how to miantain it..
Dont mind me - Just being plain straight fwd to give you faithful suggestion.