Vivid Entertainment boss Steven Hirsch just met with the guy who holds the note on Octomom's home -- and by the sound of things ... he's even closer to banging out a deal for the Octo-crib.

As we first reported, Hirsch is looking to take the note off the hands of Amer Haddadin as a way of "beginning a relationship with Octomom" -- since she's turned down all his previous job offers.

Hirsch still needs to see some paperwork -- and the inside of the actual house -- before things go any further ... but he tells us things are going in a very "positive" direction.