With the glue dispenser it will be extremely easier to use, but I am assembling it without it (yes, it is really expensive!). I cut the bottom of a small plastic cup, and mix a small amount of glue in it each time. To mix and apply you can use the small plastic stick that comes with the glue or just any other small stick/paddle item that you have around. I throw the plastic cup bottom to the trash after every mix and take another one. They are really cheap. You could use any small disposable thing you have around.
Devcon glue smells terribly bad and according to the label it could cause cancer, so use it in a well ventilated area and wearing a good respirator.