There are 2 possibilities:
1) If I use the mouse system, I need to add and code some more stuff, it will be more buggy and it will take longer.
2) If I remove the mouse, I need to remove quite some parts of code and change a lot, might take less time.
In any case, I'll still need some time to do it. But finding the time to do it might be the bigger problem. (>.<)