I had a nepenthes. The problem with nepenthes is that it will eventually grow huge. The cups become about a foot in length. I put it in terrarium conditions and the moisture damaged all the cups, as well as the newest leaf. Right now I have it in a regular pot with my other plants, but I do not think it is going to make it.
However my terrarium was for moisture loving plants. I am sure that you could set up an adequate habitat by stydying the conditions needed by the plant. As far as size... this would be the problem with nepenthes at least. You may need a very large terrarium. I believe that people do have nepenthes as a house plant. It is all about conditions.
Similarly, finding other plants that go with the carniverous plant is a matter of researching various plants and sometimes trial and error.
You seem to live in College Station, Texas? That is near Houston? I've always thought of that as being fairly humid and warm all the time. I am on the West side of the Texas pan handle, and it is very dry here. Have you considered an outdoor green house? I know of 2 carnivorous plant growers on You tube but they are up on the west coast of Canada (Vancouver). They get big snows there but seem to keep their carnivorous plants happy. They have carnivorous plants like (pardon spelling) pingicula, saracinas, nepenthes, venus fly traps all in their green houses. These are Brad of "Brad's Greenhouse," and Bill, of "PlantsNthings."