They do have all kinds of restrictions on the apprentice version, and I think you can only import FBX (but can export .obj) assets as you can see here:
http://www.sidefx.com/filmtv/compare/
That being said, once you are comfortable enough in working with the software (it is very different from other typical 3D apps), you can upgrade to the indie version (save up for a few months?). The Indie version is a restricted commercial license, similar to what they have with Unity. The indie version is not that expensive, as it is based on the full Houdini FX version - we should be glad we have it. I am working on a Houdini course actually, along with Unreal - but I’ll post about that in the forums soon.
I’m not a salesman for Houdini, but I do not believe they’ll allow you to do what you are suggesting - so save up for the indie license whilst learning with the apprentice version - that’s what I did.