Wow... ! http://www.sidefx.com/index.php?option=com_content&task=view&id=2853&Itemid=66 for $199 annually ? Great !
From their offer: Houdini Indie uses its own file format for saving scenes and assets and is restricted to 1920x1080 when rendering out animations using Mantra. Houdini Indie also includes FBX input and output and ALEMBIC input and output. But still, that's very fair stripping down.