React native stripe implementation - 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:

Vision:
we have a react native based android/IOS app, with django python backend. we want to enable our users to get paid. We will achieve that by:
- integrating stripe into the app to process credit card payment
- linking each stripe transaction to a user
- linking each user to an @handle

Tasks:
1. Integrate stripe checkout on all profiles as a ‘pay creator’ button. This button is shown on profiles you are viewing (not your own logged in profile)
2. Payer must receive receipt of payment. Payee, should receive email that they’ve been paid
3. Add earned field on user profile like upwork
4. Add an @handle field in settings page + explanation(sign up)
5. Upon each payment. Admin should receive these info in an email to begin processing the payment.
a. Username of paid user
b. Email of paid user
c. Amount to be paid
d. @handle
e. Stripe transaction ID

Milestones:
1- Setup development environment, run build successfully
2- stripe implementation
3- Earned amount UI and backend
4- System to receive payout details
5- Testing, review, validation

Conditions:
- Freelancer must write clean/commented code. And must refactor code upon instructions
- Freelancer must deliver on deadline, without delays.
- Freelancer must have MacOS. Must verify that he is able to build and free of errors before starting implementation
- Freelancer must commit code to the highest of standards
- Freelancer must adequately test before each commit
- Freelancer must self-start and not require handholding

Estimating assumptions and context:
The scenario is based on a Freelancer listing from 2022-06-04 (historical project ID 33839397). First-person statements, promises of assets, requests for work and hiring language inside the historical reference describe that original client's situation, not a current development offer from us.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 250–750 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.