Rich ::
Depending on how in a hurry you are, I would just wait for Michael's implementation.
I have a feeling it will be the simplest option for that kind of job.
Keeping revit for the moment would save the time/frustration involved in learning and using another software.
If you have even a "low tablet" with not many hard memory you can use something like https://www.realvnc.com/
and like this run any programs on your tablett! ;)
It's truely amazing to run Moi3D like this!
You can also put an OTG connector for put a mouse 3 button + wheel on your Tablet ;)
(exists of course all made! ) 2$