Kidneys are allocated by a point system under UNOS. Candidates get one point per year (pro-rated by # of days), as well as 4 points if they are a prior living donor (I think you get credit for liver lobes as well).
Start reading on page 83:
https://optn.transplant.hrsa.gov/media/1200/optn_policies.pdfNo idea on the smoke/drink thing, though an MD told me 6 months ETOH free for a liver.