Get the transmission issue fixed first before it becomes a bigger problem.
I wouldn't wait long to do the CVS boot depending on how much it is leaking.
I assume you mean sub frame bushings. They have to be really bad to be able to tell if sub frame bushing is bad without tearing it done. If bad you will often hear a clunk going over something like a speed bump. If the bushings have around 100,000 miles on them they are due but I don't consider the job as something that must be done immediately based on your question.
Can't help on prices, not in Canada.