According to the UESP, it is not necessary to build the Bedrooms addition on the west wing of your home if you have included the two chests and two single beds in the main hall. However, after building the Windstad Manor w/ the double bed, the two chests and two single beds in the main hall, there is not an option where I can move my family into Windstad Manor. I also tried the "divorce console command"* as well as the http://www.nexusmods.com/skyrim/mods/47259/?, I still cannot bring a children into Windstad Manor.
*Here is the "divorce console command":
- removefac 51596
- player.removefac C6472
- resetquest 74793
- resetquest 21382
- setstage 74793 10
It seems that things got worse when I remarry him, there is no option of moving him into any of my houses.