I agree with previous posters - technically getting it up and running is just the start - winning hearts and minds is a long term job.
We started using moodle about 4 years ago and even now there is a way to go. However it does depend on your approach - we didn't at any point force staff to use moodle - we just encouraged and gave training. We let staff come to it in their own time and gave them a lot of freedom to structure courses however they wanted. I'm not saying this is the right approach, as it does cause some problems, however it suited our institution.
I know some institutions have IT staff creating the courses, or they have SMT or quality managers requiring staff to have materials on a VLE. This gets things up and running quicker but at the cost of staff losing ownership and involvement.
If you're talking about technically getting everything set up then your deadline seems reasonable, especially if you're paying for a VLE so will receive some training and support from the company. If your talking about an institution-wide shift in attitude...then be ready for the long haul. Best of luck!