Lohan, 24, was ordered back to the Betty Ford Center on Friday instead of given more jail time, but the actress's probation report raises questions about how much longer she can stay at the pricey desert facility.
"She indicates she can not afford to continue to pay for the treatment program and she needs to work," says the report.
Prior to Friday's hearing, Lohan had requested that she move into outpatient care after her 30-day stay at Betty Ford ended this weekend. Instead, Superior Court Judge Elden Fox ordered her to remain there through at least Jan. 3.
This will have kept her there for about three months; a 90-day stay typically costs $53,000.
"[Lohan says] her clothing line is falling apart because she is not available to monitor the product," the probation report states.
But a source tells PEOPLE Lohan has continued to work on her 6126 line from rehab, even having a concept meeting for her fall 2011 collection recently with her business partner Kristi Kaylor.
"Lindsay is still seeing income from the line, and it's doing three times better than originally expected," the source says. "It's keeping her busy and productive."
Lohan also had a movie set to begin filming in November, presumably the Linda Lovelace biopic Inferno, and that she "is claiming that continued inpatient treatment would be a hardship financially, and damaging to her career," according to the report.
Dr. Lee Sadja, who dealt with Lohan during her stay at the UCLA Medical Center, believes the longer [Lohan] is at the Betty Ford Center, the better. "There was some denial regarding her drug addiction. [She] needs to continue to work on her issues in order to save her life," the report says.
Gary Richman, a chemical dependency counselor who also worked with Lohan, agrees the actress is not ready to leave the clinic.
Richman believes "she has a lot of growing up to do," the report says. "[She] finally began to talk about feeling powerless and about being an addict ... She must make several changes in her life in order to succeed, especially coming from a family of dysfunction."