Hi,
I can very well integrate the ccavenue payment gateway on your site. however, I would like to know If you got the ccavenue module for open cart, OR you are asking to develop the module.
Also, your 2nd point is not clear. can you please explain what you wish to do.
PLEASE NOTE : Rs. 600 is just the placeholder propose quote. I will provide you my original quote upon clarification.
Thanks,
Dilip Gupta