I'm sure its 'a lot' for a day laborer, but for a person who can afford to travel to the US 700-950 INR should not be 'a lot' Check with your local lab, RT-PCRs are usually available overnight. You just have to catch the right time window when the sample goes to the lab for the day. They usually do a mass sample of 40 samples and test it together to ensure a quick return and save costs.