Expert Website team Require - PayPal & Stripe similar platform require with an Exchange option of Accepting payments and Sending payouts globally.

Payment Exchange and own Payment Gateway - Platform Require
Like Stripe and PayPal + with the option of Accepting payments and Sending payouts globally.

Responsive Website
Money Exchange.
Wallet - Account, Transactions, Card, etc.
Payment Gateway. (API & Plugins)

Panels/Dashboard
Full Website Control - Admin Panel & Staff Panel

Website, Admin & APIs Complete Documentation

-- Users can credit payments to their website account (from any source)
-- Users can withdraw payments to any required accounts (banks, cards, etc.)
-- The website will provide its own Payment gateway so Users can add their Apps and websites.
-- Users can get their own Card facility

Type at the start of your proposal " Custom new Payment Platform "

I don't want any prefunded accounts (I need the best way to do this)
- I need this as in multi-vendor eCommerce Functionality
Where the buyer buys the product and pays for it.
Payment comes to the product merchant account. and merchant can withdraw it to any account or wallet where he wants.
the
Here on this website, the same concept - just replace the word merchant with the user and withdraw with receive.

Don't submit a proposal
-- Without reading details.
-- (1500$ - 2000$) If your budget is much over from this.