If the vehicle checks out for all fluids and has not other issues like bad tires etc. You know the normal things to check then you will likely be fine. These vehicles run strong for quite a while.
Sorry to hear about your Bro. It is always sad when you lose a loved one.
Enjoying an E89 Z4, E82 128i and Fiat Pop 500 / Missing my E85 Z4 (sold)