How long do I have to wait for an all clear for a neck lift after thyroid surgery?

Was going to have a neck lift this year, sadly am having thyroid removal surgery & left neck dissection which means my scar will be higher & from center to left; no RAI. My questions 1: how long do I have to wait for an all clear for a neck lift? 2: will the scar keep me from having a neck lift? 3. I was planning on having a breast lift & reduction too, but my friend who had same said she didn't need a neck lift after breast job, I only have a little loose skin under chin. Advise?