Closing In On $6 Million Miami Pad By KIM And KOURTNEY KARDASHIAN

You're appearing at the $6 million Miami mansion that Kim and Kourtney Kardashian will most likely call home for the next 3 months while filming their next spin off show, TMZ has learned. 

Sources close to the production tell TMZ ... crew members have been tasked with finding a home for the K squad while they shoot their upcoming reality show "Kim and Kourtney Take Miami."

If you didn't watch the 1st "Kardashian" spin-off in Miami ... Khloe and Kourt stayed in hotels during their stay ... because they're swanky and awesome. 

But this time around, Kourt, a mother of 2, decided she wants to be in a house ... actually big house. 

We're told ... the presence runner is the $5.8-million dollar Mediterranean style MANSION pictured above ... which boasts 6 bedrooms, 6 1/2 baths ... over 5,000 square feet ... a pool ... AND an attached dock with room for a 100' boat. 

Which they totally need.

Sources say they are considering other places, but at this point, it would be a shock if they didn't wind up in this place.