There is no way of telling what he means by that statement, as it is probably different for everyone, he might just mean yeah sure later on,but when i use the term maybe i usually mean probably not, but that is just me,it is my way of getting out of a difficult situation when someone asks me to do something i dont really want to do,but remember that is just me, it certainly does not mean he means it that way at all.

It is kinda standing on the fence, neither a yes or a no isn't it? So I would just ask him outright again, and see what happens. Good Luck.