Steve.. There have been many occasions that I have gone into a bosses office and said I need two months emergency leave.. I dont think I was ever refused once!!..
I`m sure that your employer could see his way to allow you to have a couple of months off for you to do what you gotta do..
Those 2 months could change a lot of your thoughts..and answer a lot of the questions that are spinning away in your mind..
If after those two months you confirm your long term plans then you could always add the two months onto your 5 year plan..
For me,its imperative that you do this at some point..
Call it a dummy run.