Another inexpensive (< $200), 3D, FEA program I've used is GBEAM from Grape Software.

http://www.grapesoftware.mb.ca/

I have not used the Windows version, but I got results identical to Ed Levin's when I ran the DOS (v2.0)version on the Speed River Bridge and also on his 1 1/2 story Cape from Timber Framing.