Add Features in Couponpress with external plugins and create a child theme for new design, look , layout [Wordpress]

Hello, Project Price in usd $30 To $200 ( Bid Minimum Price) I am using Couponpress theme and all works are only for Couponpress Theme ( Premiumpress) on wordpress. this theme provide all features to change wordpress site to coupon site . i want to add features in couponpress theme through Plugins. These Plugins to be made for couponpress theme and it should work with any child theme of couponpress ! just think these plugins as module (part) of premiumpress main theme but it's divided in many plugins. now you may think .. why not to customize main theme or why not to add features directly in main theme. answer :- if i customize main theme .. then all customization will be loss once i update main theme to latest version ! so if i add those features with different plugins then in future if i update my theme then i will not loss any features... as these features are with external plugins .... which i can install or uninstall and activate or deactivate ! And I need Child Theme to Extend my website design, looks, layout etc. first of all i would like to tell you.... it's just my startup so i will select low price bid .. but in future i will move from premium press theme to complete new Script for coupon website with good price .. and if you complete my project in low price with high quality then in future i will provide you all my projects to you.. Just help us on start up .. and next is yours. My Requirements are :- All Inbuilt features should work. Right now i am using default design of couponpress .. but i need a new high quality design with material design. 1 . Drop down list to select store in backend while creating coupon :- when we creating coupon .. there is only one option to select “Store” and that is just check box.. we need to “Click on checkbox” to select coupon.. and if we have thousand stores then it’s impossible to select theme .. so I need a drop down store list.. 2. Coupon Should open in lightbox popup With Copy button / For Deals.. Deals Activated Button with no action. --- Popup feature - Email Subscription / Store Detail Or Custom Text can be used in lightbox with coupon popup ! ( custom text message means a text for all popup .. it can be how to use coupon tip. - Current Coupon Details in bottom of popup P.s - I can decide which one will be on bottom of popup or which one second bottom of popup ! or i can disable these features. 3. Email Subscription for each stores and categories 4. Subscription Emails can be export ! 5. Better Search Option :- Search options will search stores only ( live search ) 6. Homepage can be customized.. i can show Top Store + Latest Offers or Top Stores + Coupons With Selected Category, and more. 7. Expire Countdown 8. Expired coupon should look different from active coupons and Button text should be "Expired" . 9 - Select Store on frontend coupon submission - Right now Store selection option is not available from frontend so i need a feature so visitors can select store while submitting coupon. 10. store page should have details with rating. ( i can write full description about store and user can rate it ) Well you can guess theme/design features like Menu, sidebars, footers etc footer can be 3 column or 2 column or 1 column . Sidebar can be hide on Homepage, store page. Coupon View With Grid view and list view. Good Look & And Design :- I need good look and design ( Responsive ) ( Widgets Can be disable for mobile responsive) material design with color codes or depend on you ! Website Fast Loading Speed (important) Slider ( latest coupon or featured coupon or featured store or popular store ) No Compromise with SEO !! You can share a site mockup for layouts and other stuff! so it will better to complete work in less time ! SEO work should be top quality.