Hi
Charges vary from hospital to hospital but it's minor procedure so won't cost much.but should be done in operation theatre.
If not scooped out the contents some times the swelling persist post surgery .
You might get chalazion in future again because there are Many glands in eye lid.
It's a simple and minor procedure , you can go ahead for surgical procedure if it's not getting resolved with medication.
Next Steps
you ask 2 to 3 hospitals in your place for charges .
Health Tips
if its painfull you can try medication and wait for at least 2 weeks if it's a Stye.