I think I have been there. In my biography this chapter will be called "My life in search of an understandable CFD package and the Unicorns".
I tried first to actually use free software before deciding about anything else (that was what I did in the end: I decided not to buy anything else).
There is
http://www.openfoam.org/ and
http://www.freecfd.com/ Their manuals are interesting, specially if you, like almost (almost) everybody in this planet, hate numerical methods more than Michelin.
Check
http://www.openfoam.com/docs/user/ if you want to rob a few hours of your employer. The manual is user oriented, but that's a plus if you ask me. You can collect a couple dozen good questions in less than an hour and then check how more professional packages handle those issues.
These programs have no fancy interfaces, so these tutorials take you to the raw fundamentals in minutes. They are a bit incoherent for the casual reader, like me, but take in account they're written by C programmers who besides are aerodynamicists, an explosive cocktail of matrices.
