Fludarabine, Cyclophosphamide, and Alemtuzumab in Treating Patients With Recurrent or Metastatic Renal Cell Carcinoma (Kidney Cancer) Undergoing Allogeneic Stem Cell Transplantation

RATIONALE: Drugs used in chemotherapy, such as fludarabine and cyclophosphamide, use different ways to stop cancer cells from dividing so they stop growing or die. Peripheral stem cell transplantation may be able to replace immune cells that were destroyed by chemotherapy. Sometimes the transplanted cells can reject the body's normal tissues. Alemtuzumab and tacrolimus may prevent this from happening. PURPOSE: Phase II trial to study the effectiveness of combining fludarabine and cyclophosphamide with alemtuzumab in treating patients who are undergoing allogeneic stem cell transplantation for recurrent or metastatic renal cell carcinoma (kidney cancer).