Our government has a program called "Medical Tourism". Which means you will get your Visa approved in record time and you will face no problem while you will be here.
You will be given 5-star hotel like facilities in a hospital at a fraction of what it would cost in Europe. Please do some research on it. No trolling. You would have to research a good hospital. It would depend on the condition you have. If you can share the name of the condition, I might be able to recommend a good known hospital.
I agree that flights are really expensive right now.
Edit: The hospital themselves will take care of your visa issue. They provide end-to-end package, where everything including stay will be take care of.