Dear Client,
in response for your questions :
1- it depends on you .. we can use linux or windows server
2- you will have one year support for any problems on the code we have did.
3- 60 days
Greetings from Nile Design, I have experience with these skills. We do have similar experience doing something similar to yours; therefore I am looking forward to discuss and move a head.
Please check our freelancer portfolio at https://www.freelancer.com/u/NileDesign.html?page=portfolio
I am ready to work with you, kindly waiting for your response.
Thanks & Regards,
Nile Design