I am good with 20-25k rupees (450-550$)/month. As i said, i was a tester,I have little ruby and java knowledge. But i can also learn python if required for work.

In that case, I'd highly suggest learning the ins and outs of ruby or python. I'm sure you could get an offshore job with a company for that sort of compensation, or do freelance work to get in that range. Good luck!