1996 Lexus ES 300 Oil Leak/Cracked blocks

Hello,

I just bought a used vehicle and thought that it would be a good deal. After a few days the car started leaking oil. I took it to a mechanic and he said that the car has two cracked front blocks and one in the back. He quoted that it will be between $800.00-$1200.00 to fix. The mechanic seemed very honest and professional and told me that I could just refill oil, but should also replace the timing belt sooner than usual, because the oil leaked onto the timing belt. I don't really have the funds to pay for the repair and was wondering if there is any cheaper way to fix it. I read about CD2 Engine Oil Stop Leak and wanted to know if that might help with the cracked blocks.

I would appreciate any advice you can give me.

Thank you