Natus, I feel for you brother. Although I'm in a similar situation (in house separation) we don't have a young child together. I can only imagine the difficulty in trying not only to figure out what is best for you, but also having to weigh that with your sons needs.
M - 9 1/2 years 5/5/16 - Bomb drop - 3 week EA 10/31/16 - We sold house 01/10/18 - D Finalized