I take it you are young enough that you don't have a job or financial obligations that prevent you from going for so long, nor kids....a chance like this will not present itself until you retire. The most I can get are about 1 week long trips, simply because I get a week more than my wife does of vacation or I wouldn't even get that, just long weekends occasionally.
I would not waste a chance like this because it will be 40 years before you get it again.