The limitations of a shooting tent are size of subject and lighting tends to be flat. If you're looking for "creative" lighting it may not work out for you.
On the cheapskate front, build a frame from PVC pipe(1 1/4") & drape it with translucent material form the fabric shop & use any size frame you want, remove a side if you want a more harsh light etc. It'll cost more for the fabric than the pipe to build the frame.