Not true. Even today, HLS costs less than $60,000/year if you live on a budget, and it was far cheaper back then. Further, there is significant grant aid for low-income students, and the law firm he worked at the summer after his second year probably paid him over $1,000/week.
Your asumption of NOT TRUE may be rather hasty and there is no evidence that the Obama’s lived a life of sacrifice in Boston’s notoriosly expensive environmemt. But some do choose to believe the Obama Sob stories at their face values which is rather naive to say the least. Believe what you wish?