hi, for your grocery portal, IMHO you should either go with woo-commerce or Shopify store, since in India both of them have good services.
with woo-commerce the website will be free but you'll have to buy separately hosting, domain, ssl certificate and other plugins (only if it is paid plugin), and and it will take some 10-15 days to get ready.
with Shopify it will charge you appx 1000 inr per month but everything else comes free with it like ssl, hosting etc and your site will be ready in 2-3 days beside products upload.
so whichever you choose i can design for you.
Beside, website i'll also give you google analytics integration FREE, as well as some basic goal setting, cart tracking setup free.
Beside this, I'll also give you FREE webmaster tools configuration and setup of your website so thay your site can stay google compatible to receive free google search engine traffic.
not done yet, I'll also give you FREE 20 hours of onsite SEO optimization so that you can start receiving free customers from google search engine.
more to come, i'll also FREE setup your mailchimp email account configuration and will setup configuration with your website so that you can build your customers email list for FREE.
last but not least, I'll alsp give you FREE 10 hours of Google AdWords marketing if you start the project on/before 17 September.
what do you think?
i am quite excited to work with you on this.
waiting for yoyr green signal.
Best, Gaurav