I mean I don't think we are talking about major bucks for Kane. He's likely going to be ready to come back near the trade deadline. Sign him when he's ready to start hard on ice training probably going to be 1 year $1M.
Team has a top 9 RW hole. Rather add him for just money then moving another 1st or 2nd for a rental. If it doesn't work out it doesn't work out.
Preface would be that if Kakko is producing/clicking on a line that Kane doesn't automatically usurp him.