Dina Lohan -- Paid $50,000 for Blowout Talk Show Fight

Dina Lohan says she's come West to support daughter Lindsay Lohan who is struggling to get better in rehab -- but hey, if she can make a buck along the way -- or 50,000 of them -- why not?

As we told you ... Dina and Michael Lohan went nuclear on each other Thursday during a taping of a new show that uses lie detectors to settle disputes. Dina and Michael were at each other's throats over Lindsay, infidelity ... the usual.

So why would Dina and Michael go on a show? To help Lindsay get better? Unlikely. To settle their differences? That's never gonna happen. The reason is simple. Dina got $50 grand, and it didn't feel dirty because we're told she got Lindsay's permission in advance.

We're told Dina plans to use the money to bail herself out of the financial mess over the family's Long Island home, which has been teetering on the edge of foreclosure.