EXCLUSIVE: Lamar Odom Struggled in Las Vegas, Was 'Pretty Much Broke,' Source Says

A source tells ET that the former NBA star was living in Las Vegas and was allegedly 'broke.'

New details surrounding Lamar Odom's recent personal struggles are surfacing after the former Los Angeles Lakers star was found unconscious at the Love Ranch brothel in Crystal, Nevada, on Tuesday.

A source tells ET that Odom has been living in a gated community in Las Vegas for most of the year, but that it was unclear how the 35-year-old was paying for the house.

"Lamar barely has any money left from his NBA career,” the source says, claiming that Odom was "pretty much broke." Odom moved to Las Vegas to rehab an injury, but, the source says, “He hasn’t played basketball or trained seriously since leaving the Clippers."

WATCH: Kardashian-Jenner Family 'Still Loves' Lamar Odom, Source Says, He 'Just Has Very Bad Demons'

Lamar began his professional career with the Clippers in 1999 until he was traded to the Miami Heat in 2003. Lamar spent most of his career with the Los Angeles Lakers, but returned to playing with the Clippers until 2013, when he became a free agent but did not land an NBA contact.

"He refuses to get help and no one close to him forces him to get help," ET's source claims, adding that Lamar's alleged substance abuse may have even cost him his marriage to Khloe Kardashian.

ET's source claims Khloe attempted to get Lamar help, but it "got to the point where she just couldn't handle it anymore."

WATCH: Khloe Kardashian Is 'Beside Herself,' On Way to Las Vegas With Kim to Be by Lamar Odom's Bedside

"Lamar is not a bad person, he just has very bad demons," the source tells ET. "When Lamar is good, he's good. But when he's bad, there's no way of getting any worse."

In a recent episode of Keeping Up With the Kardashians Khloe admitted that she keeps in touch with her ex and frequently checks up on him to "make sure that he's OK." After being informed of Lamar's hospitalization, Khloe and her sister Kim reportedly flew to Las Vegas to be with Lamar at Sunrise Hospital.

Lamar was discovered unresponsive by employees of the Love Ranch on Tuesday after spending several days at the establishment. According to the Love Ranch owner Dennis Hof, Lamar showed up on Saturday evening in "a great mood" and "just having fun."

However, Hof told ET that Lamar's mood quickly soured and by Sunday, "he seemed upset [and] a little somber."

WATCH: Lamar Odom Was in a 'Great Mood' Days Before He Was Found Unconscious, Says Brothel Owner

Authorities have not released additional information regarding Odom's hospitalization. However, Hof claims that, while Odom had been taking an herbal substitute for Viagra, “police couldn’t find drugs," at the scene, and that Love Ranch management didn't find any either.

Check out the video below for more information on Lamar's hospitalization on Tuesday.