Octomom -- I GOT A NEW HOUSE ... Paid for By Porn

Success!!! After multiple rejections from landlords ... Octomom and her 14 kids have finally secured a new place to live ... and TMZ has learned, she's paying for her new digs with PORN MONEY.

Sources tell us, Nadya Suleman's new hatchery is located in Palmdale, CA -- and according to the listing, it features 5 bedrooms, 3 bathrooms, a 3-car garage ... and a massive 14,000 sq. ft. back yard where she can pasture her children.

We're told the backyard also includes a gated pool and spa with a slide and a gazebo.

And the entire place is only running her $2,150 a month -- gotta love back country California.

We're told Octomom dropped 8 months rent in advance to secure the place, plus a giant deposit -- and most of the cash came from her solo masturbation video.

She plans to move in shortly.