I thought about some more and since you have the recorder and it is free you can make as many recordings as you want and only rent the processing portion for a month or three when you get ready to make the motion files.  Not as nice as having the software all the time, but if you only do small projects / short then it could be a valid soluation.  The recorder files can be viewed at any time,, within the recorder or even media player.  Just looks weird having 6 images playing playing in multiple view ports.  I am sure that with a little practice you will be able to view a recording and have a pretty good idea if it will make a good BVH file.

Poser 5, 6, 7, 8, Poser Pro 9 (2012), 10 (2014), 11, 12, 13