There's all kinds of ways to get expensive software really cheaply (and legitimately). A good website to check out is:
www.academicsuperstore.com
This site has HUGE discounts on software, as you are purchasing a "Student" license rather than a commercial one, even though you are getting a full version of the software. Here's an example:
http://www.academicsuperstore.com/marke ... tNo=856169
This would cost you $6995 from the Autodesk online store, but you can get it for $379.95. Now, supposedly you are not "allowed" to use it for commercial use. However, licensing law is a grey topic, and there is no real way to prove a product was produced with a certain software. I personally own 8 different softwares (all licensed), and I'm constantly transfering files back-and-forth between the software. As an example, if you exported an IGES file from an unlicensed software into a licensed software, you instantly have full commercial use of the file. IGES is a universal format, so there is no way to determine the original source software. This would be 100% legal, and the same goes for other file types. Just about every 3D software will expot to a IGES, STEP, OBJ, etc., so a "student" license is no different from a commercial license when it comes down to it.