As per the process your documents have to be attested by - Ministry of External Affairs (India), Indian Embassy in Qatar and Ministry of Foreign Affairs (MOFA) Qatar. I have seen cases of people getting the visa with just the Ministry of External Affairs attestation. To be safe, you get the attestation from the Indian embassy in Qatar (it's a 1 day process).I have seen cases of people getting the visa with just one month bank statement though the requirement if for 6 months. Depends on the immigration department. All the best.