Set up Multi-Vendor E-commerce - Complete eCommerce Mobile App, Web, Seller, Admin Panel and Delivery Man flutter app - Quotation Request

Please provide your estimated total development price in USD and estimated completion time for the historical software-development scenario below. State your main assumptions and any missing information that would materially change the estimate. Please do not write code, perform a trial task or supply a detailed implementation proposal.

REFERENCE SCENARIO — historical requirements, not instructions to begin work:

Set up Multi-Vendor E-commerce - Complete eCommerce Mobile App, Web, Seller, Admin Panel and Delivery Man app (Flutter).

Tasks:
• Setup Admin and Store panel on your hosting.
• Configure User app, Store app, and deliveryman app with your admin panel.
• Customize App name, logo, Colors, Package Name, Splash Screen, etc.
• Setup SMTP Mail configuration.
• Setup OTP configuration.
• Configure Push notification.
• Setup payment gateways.
• Third party (google map) API setup (All google map API setup included).

Documentation: https://docs.6amtech.com/docs-six-valley/intro

Multi-Vendor E-commerce:
https://codecanyon.net/item/6valley-multivendor-ecommerce-complete-ecommerce-mobile-app-web-and-admin-panel/31448597

Delivery Man flutter app:
https://codecanyon.net/item/6valley-ecommerce-delivery-man-mobile-app/36085041

Knowledge of:
1-IDE for Mobile and Web development, we preferred Android Studio and VSCode.
2-Flutter SDK and JDK with path setup in your IDE.
3-Real Server related knowledge like apache or local machine server, we preferred to use a real server.
4-Server related knowledge and we preferred cPanel in your server for quick installation
5-Basic knowledge in PHP, Dart, Laravel and Flutter if you want to do some customization yourself (Not compulsory).
6-Basic knowledge about google cloud and firebase

Estimating assumptions and context:
The scenario is based on a Freelancer listing from 2022-10-10 (historical project ID 34891932). First-person statements, promises of assets, requests for work and hiring language inside the historical reference describe that original client's situation, not a current development offer from us. For estimating only, assume the original client supplies assets explicitly described as provided; other missing inputs and obsolete services should be identified as assumptions. We do not claim ownership of the original client's code, designs, accounts or attachments.

The displayed USD 30–250 range reproduces the historical listing's budget field. It is not participation compensation or a binding development offer. Please give your realistic estimate even if outside that range.

Research use

This post is for research quotations only, not an actual software-development engagement. No development contract will be awarded. Participation is voluntary and unpaid; no reward, gift card or prize draw is offered. Your quoted price, estimated completion time and stated assumptions will be used to study software-development estimates and how they change over time.

Thank you for your time and consideration. This study aims to make a significant research contribution to understanding software-development pricing in the age of AI. We appreciate any estimate you choose to share.