LeBron James -- Rent My Custom Lambo ... for $7,000 A DAY

Going to Miami anytime soon with money to burn? Great, because you can now rent a custom Lamborghini Aventador for the wildly inflated price of $7,000 a day ... and you can thank LeBron James for the opportunity.

Sources at Lou La Vie exotic car rentals tell TMZ, the car was commissioned by Nike for LeBron's new sneaker unveiling Sunday night -- designed by Rich B. Caliente to match the new green LeBron shoe, for better or worse. (Kinda like the Chris Brown job back in July.)

Nike just paid to use the car for one night, so we're told it's going back to Lou La Vie and they're keeping the custom wrap on it.

Normally, Lou La Vie rents their Aventadors for around $4,000 per day -- but the LeBron wrap will cost you another $3k.

Worth it?