Ditto what JB said. I'd proceed as planned. The other option seems to be offering your W the opportunity to stay in your home until your son graduates. 5 years?! No way man.
M 43 X 38 T 13 W moves out of home 11/2010 Roller coaster from hell 2/2011-5/2012 I request divorce 5/2012 W moves home 6/2012 Good time 7/2012 - 1/2015 I leave 3/2016 process of divorce