Hi, For current Covid situation Istemara shouldn't be an issue as you can get it done without having to test the car i.e if it is expiring in a few months. But like goodlittleboy mentioned there are plenty of garages in Industrial Area that would fix a Hyundai. So, if you are really keen on buying the car now is the time to buy it.
Also make sure it's not the head gasket that needs replacement because that might cost you higher. Good luck!