I'm so sorry you lost your first baby, and that you are now having kidney problems. My mother never had preeclampsia, but she did have kidney disease while pregnant (she has primary hyperoxaluria, which causes excess oxalates in her blood that form stones in the kidneys. She lost one of her kidneys to the disease when she was 18 or 19). She had five healthy children with her disease and with only one kidney, so it is possible. There are so many different types of kidney disease, with different levels of severity that I wouldn't give up hope of having a baby yet, if I were you. I would, however, find a good nephrologist who can help you manage your disease and help your OB manage your pregnancy when you are trying to conceive again.
Good luck with everything, and I hope it all works out for you!
1st - miscarried at 11 weeks in Dec. 2009
2nd - baby girl born Mar. 2011 at 29 weeks 6 days due to severe PE
3rd - baby boy due June 19th, 2012