proflyer...
you do need to get your foreign license converted to the Indian one bfor any of the airlines will even look at your resume ....
that could take anywhere from 3-6 months depending on your performance in conversion papers and your R/T conversion....
Now, is 250 hrs enough?? Yes and no. Having approx. 2500 and ATPL would be great but otherwise ...with the way airlines have ordered A/C the need for pilots is bound to increase....
Paying for rating is still happening though some of them take a bank gaurantee....u'll need to talk to them yourself....
finally, the decision is entirely yours but I would come over and convert my license if I was in your position...
hope it helps....