Customize and installation of Codecanyon script

I am looking for a freelancer to customize and install a Codecanyon script named Demandium. Please find the requirement below and let me know the price & lead time.
1. Localisation
a) Language change to Chinese (Translation shall be provided from our side)
2. Customization
a) Disable functions:
i) Social login options
ii) Wallet
iii) Chat
iv) Provider bidding
b) Sub categories services can put into cart at once
3. Reskin & Installation
a) Admin/Provider/User web
b) Landing page
c) Customer Flutter web app
d) Customer Apple app
e) Customer Android app
(with Firebase, Map & Stripe payment integration)