[kstl99]

I really think that you should get Inventor. I assume you are a student and as such you have an opportunity you may not get later. You can get it free with tutorials and have support from the FIRST community even if your mentors are not familiar with it. I have seen more companies that use Solidworks but there are still plenty that use Inventor so knowing it may come in handy in the job market. The more you know the more valuable you become.