Moving in together before marriage

We are getting married April 16th in panama on shell island. I have a son from a previous marriage and he has none. He owns his own home with some land and I'm renting while I'm in college. His room mate moves out this month and we have been discussing me going ahead and moving in together so we can save more for the wedding and a little nest egg.

My son and my fiance have a bond like no other. So that's not an issue. My main focus has been whether or not it will take the special out of moving in together once we are married. It makes sense financially and I'm so anxious to come home to him every single day and fall asleep with him at night. I just don't want to ruin waiting... if that makes sense. Any advice, suggestions or experiences of your own are appreciated.