Madam, It is waste of time and energy filing RCR. Please show your intentions of living with him in the original divorce petition. You can file section 24 in the same divorce petition, to cover your litigation charges. Also you can seek to move your petition to your town. You mentioned you are in Kerala. Where is he located ?
Lawyers fees depend on his standing and your ability to pay and many other factors. Divorce process may not end in 2-3 years, it will take anywhere between 5 to 7 years depending on the courts and the parties involved.