BUYING THE CAROLINA PANTHERS!!

Coach ain't kidding ... telling TMZ Sports that Vince -- whose secret home base is North Carolina -- has what it takes to plop down a serious bid.

"He’s a billionaire, he could come up with the funds, and he’s also at the age where other owners would respect that," Coach said.

But Coach -- who was also an analyst for XFL -- is more confident in McMahon bringing back his own football league ... and says this time, it ain't gonna flop.

"Whatever this is, they’re gonna do it the right way."