COSMOSWorks, COSMOS-M, flow, thermal....... which particular flavor are you looking for?
Do you have previous FEA experience and if so how much?
Try going to Amazon.com and doing a search. You also get previews to look at.
You might seriously consider taking a class. This might sound expensive, but if you end up with a major goof due to inappropriate analysis it will cost you a WHOLE lot more.
FEA is interesting. It's like making a Lego brick model of the real thing. FEA software will give you a very accurate analysis of your Lego brick model. Problem is if your model does not correctly represent the real thing, neither will the analysis results. It can fool you into a false sense of security and major problems. The issues can be very subtle.
Be naughty - save Santa a trip.